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1. |
If y varies directly as x and y = 21 when x = 5, find x when y = 42. |
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A. |
5 |
B. |
4.2 |
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C. |
10 |
D. |
21 |
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Hint |
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2. |
Determine the value of r so that the line through (5, 2) and (7, r) has a slope of  . |
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A. |
2 |
B. |
3 |
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C. |
6 |
D. |
1 |
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Hint |
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3. |
Write the standard form of an equation of the line that passes through
(-2, 5) and has an undefined slope. |
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A. |
-2x + 5y = 0 |
B. |
x - y = 3 |
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C. |
y = 5 |
D. |
x = -2 |
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Hint |
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4. |
What is the slope of  in parallelogram ABCD? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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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 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 is negative, the value of y negative. |
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Hint |
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6. |
Suppose y varies directly as x, and y = -65 when x = -26. Write a direct variation equation that relates x and y. |
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A. |
 |
B. |
 |
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C. |
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D. |
 |
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Hint |
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7. |
Write an equation of the line shown in the graph. |
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A. |
y = 2x + 5 |
B. |
y = -2x – 5 |
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C. |
y = -2x + 5 |
D. |
y = 2x – 5 |
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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. |
 |
B. |
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C. |
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D. |
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Hint |
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9. |
Which equation describes the line that contains the points (-1, -8) and (-9, -21)? |
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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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10. |
Which equation describes the line that contains the points (7, 17) and (15, 33)? |
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A. |
y = 2x + 3 |
B. |
 |
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C. |
y = -2x + 31 |
D. |
 |
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Hint |
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11. |
Write  in slope-intercept form. |
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A. |
 |
B. |
2x - 9y = -55 |
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C. |
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D. |
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Hint |
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12. |
Write the slope-intercept form of an equation for a line perpendicular to the graph of y = -3x + 5 and passes through the x-intercept of that line. |
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A. |
 |
B. |
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C. |
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D. |
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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 no correlation? |
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A. |
When the value of x increases, the value of y decreases. |
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B. |
When the value of x increases, the value of y increases. |
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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 decreases, the value of y decreases. |
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Hint |
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