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1. |
If y varies directly as x and y = 35 when x = 5, find y when x = 11. |
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A. |
 |
B. |
41 |
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C. |
77 |
D. |
7 |
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Hint |
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2. |
What is the slope of the line that passes through (8, 4) and (6, 7)? |
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A. |
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B. |
 |
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C. |
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D. |
 |
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Hint |
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3. |
Determine the value of r so that the line through (r, 4) and (-7, 7) has a slope of . |
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A. |
9 |
B. |
3 |
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C. |
-11 |
D. |
-3 |
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Hint |
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4. |
Write the standard form of an equation of the line that passes through (-2, 3) and has a slope of m = -3. |
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A. |
3x + y = -9 |
B. |
y = -3x - 9 |
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C. |
3x + y = -3 |
D. |
3x + y = 9 |
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Hint |
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5. |
What is implied when it is said that x and y have a negative correlation? |
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A. |
When the value of x is negative, the value of y negative. |
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B. |
When the value of x increases, the value of y decreases. |
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C. |
When the value of x increases, the value of y does not necessarily increase or decrease. |
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D. |
When the value of x increases, the value of y increases. |
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Hint |
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6. |
The equation V = -32t + 256 and the graph below describe the velocity V in feet per second of a ball t seconds after is is shot into the air. What is the ball's velocity after seven seconds? |
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A. |
256 ft/s |
B. |
0 ft/s |
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C. |
32 ft/s |
D. |
480 ft/s |
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Hint |
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7. |
Use the direct variation equation to find x when y = -34. |
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A. |
x =  |
B. |
x = -153 |
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C. |
x = - |
D. |
x = 153 |
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Hint |
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8. |
Write an equation of the line whose slope is and whose y-intercept is 2. |
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A. |
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B. |
 |
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C. |
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D. |
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Hint |
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9. |
Write an equation of a line that passes through (9, -64) with slope –7. |
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A. |
y = -7x – 127 |
B. |
y = -7x |
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C. |
y = -7x – 1 |
D. |
y = -7x + 1 |
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Hint |
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10. |
A rental car company charges $75 for a 3-day rental and $155 for a 7-day rental. Write an equation to find the amount that the rental car company will charge for any number of days. |
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A. |
y = 80x |
B. |
y = 80x – 165 |
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C. |
y = 20x |
D. |
y = 20x + 15 |
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Hint |
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11. |
Write in slope-intercept form. |
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A. |
 |
B. |
 |
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C. |
2x - 9y = -55 |
D. |
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Hint |
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12. |
Line segment has endpoints A(-6, -3) and B(2, 1). Line segment has endpoints C(-4, 8) and D(3, -6). Is perpendicular to ? Why? |
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A. |
No, the lines intersect but not at right angles. |
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B. |
No, the lines are parallel. |
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C. |
Yes, the slopes are opposites. |
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D. |
Yes, the slopes are negative reciprocals. |
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Hint |
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13. |
Write the slope-intercept form of an equation for the line that passes through (-4, -26) and is parallel to  |
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A. |
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B. |
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C. |
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D. |
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Hint |
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14. |
What is implied when it is said that x and y have a positive correlation? |
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A. |
When the value of x increases, the value of y does not necessarily increase or decrease. |
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B. |
When the value of x increases, the value of y decreases. |
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C. |
When the value of x increases, the value of y increases. |
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D. |
When the value of x decreases, the value of y does not necessarily increase or decrease. |
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Hint |
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