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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. |
21 |
B. |
4.2 |
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C. |
10 |
D. |
5 |
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Hint |
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2. |
Determine the slope of the line that passes through (2, 2) and (5, 8). |
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A. |
 |
B. |
2 |
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C. |
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D. |
-2 |
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Hint |
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3. |
Write the point-slope form of an equation of the line that passes through (4, -3) and (2, 1). |
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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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4. |
Write the point-slope form of an equation of the line that contains  , which is the hypotenuse of the right triangle. |
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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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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 does not necessarily increase or decrease. |
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C. |
When the value of x increases, the value of y decreases. |
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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. |
Which graph is the graph of 3(y - 3) = -2x? |
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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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7. |
Which equation has a graph perpendicular to the graph 3y = 2x - 9? |
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A. |
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B. |
y = 2x + 5 |
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C. |
2x + 3y = 4 |
D. |
3x + 2y = 7 |
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Hint |
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8. |
Find the slope of the line that passes through (-2, 9.5) and (4, 5). |
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A. |
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B. |
undefined |
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C. |
0 |
D. |
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Hint |
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9. |
Use the direct variation equation  to find x when y = -34. |
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A. |
x = -153 |
B. |
x = 153 |
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C. |
x = - |
D. |
x = |
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Hint |
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10. |
Graph 7x + 2y = -12. |
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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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11. |
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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12. |
Which equation describes the line that contains the points (7, 17) and (15, 33)? |
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A. |
y = -2x + 31 |
B. |
y = 2x + 3 |
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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 a line that passes through (-1, 0) and is perpendicular to the graph of 3x – 5y = 20. |
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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. |
Which relationship would most likely have no correlation? |
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A. |
The number of miles driven, and the number of gallons of gas in the car. |
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B. |
A person's age, and the address of the person. |
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C. |
A person's height and the person's shoe size. |
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D. |
The number of pizzas ordered, and the total price of the bill. |
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Hint |
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