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Solve the equation 9x−7y=119 x - 7 y = 11 for yy .


A) y=11−9x7y = \frac { 11 - 9 x } { 7 } or y=1.57−1.29xy = 1.57 - 1.29 x

B) y=11+9x7y = \frac { 11 + 9 x } { 7 } or y=1.57+1.29xy = 1.57 + 1.29 x

C) y=9x−117y = \frac { 9 x - 11 } { 7 } or y=1.29x−1.57y = 1.29 x - 1.57

D) None of the above.

Correct Answer

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For a certain line, a run of 4 feet corresponds to a rise of 8 feet. What is the slope of this line?


A) 2 feet
B) 0.5 feet
C) 1.18 feet
D) 2.76 feet

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The following table shows the number C , in millions, of cars sold in the U.S. The following table shows the number C , in millions, of cars sold in the U.S. years after 2005. Use the regression line for the data to estimate the number of cars sold in 2011. \begin{array} { | l | l | l | l | l | } \hline t & 0 & 1 & 3 & 5 \\ \hline C & 5.55 & 5.48 & 5.21 & 4.56 \\ \hline \end{array} A) 4.12 million B) 5.41 million C) 3.44 million D) 4.44 million years after 2005. Use the regression line for the data to estimate the number of cars sold in 2011. t0135C5.555.485.214.56\begin{array} { | l | l | l | l | l | } \hline t & 0 & 1 & 3 & 5 \\\hline C & 5.55 & 5.48 & 5.21 & 4.56 \\\hline\end{array}


A) 4.12 million
B) 5.41 million
C) 3.44 million
D) 4.44 million

Correct Answer

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Which of the tables below show linear data?  Table 1‾\overline { \text { Table } 1 } Which of the tables below show linear data? \overline { \text { Table } 1 } Table 2 A) Table 1 only B) Table 2 only C) Both Table 1 and Table 2 D) Neither table is linear. Table 2 Which of the tables below show linear data? \overline { \text { Table } 1 } Table 2 A) Table 1 only B) Table 2 only C) Both Table 1 and Table 2 D) Neither table is linear.


A) Table 1 only
B) Table 2 only
C) Both Table 1 and Table 2
D) Neither table is linear.

Correct Answer

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Find a linear model for the following data table. x1357y7111519\begin{array} { | l | l | l | l | l | } \hline x & 1 & 3 & 5 & 7 \\\hline y & 7 & 11 & 15 & 19 \\\hline\end{array}


A) y=2x+5y = 2 x + 5
B) y=5x+2y = 5 x + 2
C) y=4x+3y = 4 x + 3
D) y=3x+4y = 3 x + 4

Correct Answer

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If a rock is thrown downward with an initial velocity of 8 feet per second, then its velocity VV , in feet per second, after If a rock is thrown downward with an initial velocity of 8 feet per second, then its velocity V , in feet per second, after seconds is given by V = 32 t + 8 By how much does velocity increase over a 5-second period? A) 32.54 feet per second B) 160.47 feet per second C) 32 feet per second D) 160 feet per second seconds is given by V=32t+8V = 32 t + 8 By how much does velocity increase over a 5-second period?


A) 32.54 feet per second
B) 160.47 feet per second
C) 32 feet per second
D) 160 feet per second

Correct Answer

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Which of the tables below show linear data? Table 1 Which of the tables below show linear data? Table 1 Table 2 A) Table 1 only B) Table 2 only C) Both Table 1 and Table 2 D) Neither table is linear. Table 2 Which of the tables below show linear data? Table 1 Table 2 A) Table 1 only B) Table 2 only C) Both Table 1 and Table 2 D) Neither table is linear.


A) Table 1 only
B) Table 2 only
C) Both Table 1 and Table 2
D) Neither table is linear.

Correct Answer

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Find a linear model for the following data table. x36912y6121824\begin{array} { | l | l | l | l | l | } \hline x & 3 & 6 & 9 & 12 \\\hline y & 6 & 12 & 18 & 24 \\\hline\end{array}


A) y=2x+0y = 2 x + 0
B) y=0x+2y = 0 x + 2
C) y=6x+−12y = 6 x + - 12
D) y=−12x+6y = - 12 x + 6

Correct Answer

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At a distance 5 miles west of town, oil-bearing deposits are found 3044 feet deep. Also, 8 miles west of town, the oil is found 3164 feet down. Assuming the oil-bearing stratum lies on a straight line, How deep would you expect to drill 10 miles west of town in order to find oil?


A) 3124 feet
B) 3124.35 feet
C) 3244.77 feet
D) 3244 feet

Correct Answer

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At a distance 5 miles west of town, oil-bearing deposits are found 3187 feet deep. Also, 8 miles west of town, the oil is found 3382 feet down. Assuming the oil-bearing stratum lies on a straight line, How deep would you expect to drill 10 miles west of town in order to find oil?


A) 3317 feet
B) 3317.95 feet
C) 3512.38 feet
D) 3512 feet

Correct Answer

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For a certain line, a run of 4 feet corresponds to a rise of 4 feet. What is the slope of this line?


A) 1 feet
B) 1 feet.
C) 1.53 feet
D) 1.54 feet

Correct Answer

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The following table shows the gross national product G , in trillions of dollars, The following table shows the gross national product G , in trillions of dollars, years after 2005. Use linear regression to model G as a function of . A) G = 12.98 t + 0.36 B) G = 0.36 t + 12.98 C) G = 0.36 t + 12.73 D) G = 0.82 t + 12.73 years after 2005. Use linear regression to model G as a function of The following table shows the gross national product G , in trillions of dollars, years after 2005. Use linear regression to model G as a function of . A) G = 12.98 t + 0.36 B) G = 0.36 t + 12.98 C) G = 0.36 t + 12.73 D) G = 0.82 t + 12.73 . The following table shows the gross national product G , in trillions of dollars, years after 2005. Use linear regression to model G as a function of . A) G = 12.98 t + 0.36 B) G = 0.36 t + 12.98 C) G = 0.36 t + 12.73 D) G = 0.82 t + 12.73


A) G=12.98t+0.36G = 12.98 t + 0.36
B) G=0.36t+12.98G = 0.36 t + 12.98
C) G=0.36t+12.73G = 0.36 t + 12.73
D) G=0.82t+12.73G = 0.82 t + 12.73

Correct Answer

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Suppose ff is a linear function with f(7) =25.6f ( 7 ) = 25.6 and f(12) =39.6f ( 12 ) = 39.6 . Find an equation for ff .


A) f(x) =0.36x+25.6f ( x ) = 0.36 x + 25.6
B) f(x) =25.6x+0.36f ( x ) = 25.6 x + 0.36
C) f(x) =2.8x+6f ( x ) = 2.8 x + 6
D) f(x) =6x+2.8f ( x ) = 6 x + 2.8

Correct Answer

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Solve the equation 2x−8y=92 x - 8 y = 9 for yy .


A) y=9−2x8y = \frac { 9 - 2 x } { 8 } or y=1.13−0.25xy = 1.13 - 0.25 x

B) y=9+2x8y = \frac { 9 + 2 x } { 8 } or y=1.13+0.25xy = 1.13 + 0.25 x

C) y=2x−98y = \frac { 2 x - 9 } { 8 } or y=0.25x−1.13y = 0.25 x - 1.13

D) None of the above.

Correct Answer

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Which of the tables below show linear data?  Table 1‾\overline { \text { Table } 1 } Which of the tables below show linear data? \overline { \text { Table } 1 } Table 2 A) Table 1 only B) Table 2 only C) Both Table 1 and Table 2 D) Neither table is linear. Table 2 Which of the tables below show linear data? \overline { \text { Table } 1 } Table 2 A) Table 1 only B) Table 2 only C) Both Table 1 and Table 2 D) Neither table is linear.


A) Table 1 only
B) Table 2 only
C) Both Table 1 and Table 2
D) Neither table is linear.

Correct Answer

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We have $16.33 to spend on vegetable plants for our garden. Tomato plants cost $0.81 each, and pepper plants cost $0.38 each. There is space in the garden for 26 plants. How many of each are bought?


A) 13 tomatoes and 13 peppers.
B) 11 tomatoes and 15 peppers
C) 13 tomatoes and 13 peppers
D) 15 tomatoes and 11 peppers

Correct Answer

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A line through (8, 5) has slope 1.45. What is the vertical intercept?


A) 4.6
B) -6.6
C) -5.75
D) 4.55

Correct Answer

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The following table shows the running speed The following table shows the running speed , in centimeters per second, of ants as a func- tion of the temperature T in degrees Celsius. Use linear regression to model running speed as a function of Temperature. \begin{array} { | l | l | l | l | l | } \hline T & 25.6 & 30.3 & 32.3 & 34.8 \\ \hline R & 2.22 & 3.85 & 4.06 & 5.29 \\ \hline \end{array} A) R = 0.35 T + 2.22 B) T = 0.35 R + 2.22 C) R = 0.32 T - 5.97 D) T = 0.32 R - 5.97 , in centimeters per second, of ants as a func- tion of the temperature TT in degrees Celsius. Use linear regression to model running speed as a function of Temperature. T25.630.332.334.8R2.223.854.065.29\begin{array} { | l | l | l | l | l | } \hline T & 25.6 & 30.3 & 32.3 & 34.8 \\\hline R & 2.22 & 3.85 & 4.06 & 5.29 \\\hline\end{array}


A) R=0.35T+2.22R = 0.35 T + 2.22
B) T=0.35R+2.22T = 0.35 R + 2.22
C) R=0.32T−5.97R = 0.32 T - 5.97
D) T=0.32R−5.97T = 0.32 R - 5.97

Correct Answer

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Suppose ff is a linear function with f(8) =27.92f ( 8 ) = 27.92 and f(11) =35.39f ( 11 ) = 35.39 . Find an equation for ff .


A) f(x) =0.4x+27.92f ( x ) = 0.4 x + 27.92
B) f(x) =27.92x+0.4f ( x ) = 27.92 x + 0.4
C) f(x) =2.49x+8f ( x ) = 2.49 x + 8
D) f(x) =8x+2.49f ( x ) = 8 x + 2.49

Correct Answer

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Find a linear model for the following data table. Find a linear model for the following data table. A) y = 2 x + 3 B) y = 3 x + 2 C) y = 4 x + 1 D) y = 1 x + 4


A) y=2x+3y = 2 x + 3
B) y=3x+2y = 3 x + 2
C) y=4x+1y = 4 x + 1
D) y=1x+4y = 1 x + 4

Correct Answer

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