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1. |
Determine the value of r so that the line through (5, 2) and (7, r) has a slope of  . |
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A. |
3 |
B. |
2 |
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C. |
1 |
D. |
6 |
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Hint |
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2. |
Determine the value of r so that the line through (r, 4) and (-7, 7) has a slope of  . |
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A. |
-11 |
B. |
9 |
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C. |
-3 |
D. |
3 |
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Hint |
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3. |
Write  in standard form. |
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A. |
2x + 3y = -8 |
B. |
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C. |
2x + 3y = 0 |
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 increases, the value of y decreases. |
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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 is negative, the value of y negative. |
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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. |
Three out of the four equations listed below are equations of lines that are parallel to each other. Which equation does not have a graph that is a line parallel to the other three? |
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A. |
3x + 4y = -16 |
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B. |
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C. |
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D. |
8y = - 6x |
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Hint |
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7. |
Suppose y varies directly as x, and y = -319 when x = 29. Write a direct variation equation that relates x and y. |
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A. |
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B. |
y = 11x |
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C. |
y = -11x |
D. |
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Hint |
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8. |
Use the direct variation equation y = 22x to find x when y = 88. |
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A. |
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B. |
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C. |
x = -4 |
D. |
x = 4 |
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Hint |
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9. |
Graph  |
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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. |
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. |
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B. |
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C. |
y = 2x + 3 |
D. |
y = -2x + 31 |
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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 a negative correlation? |
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A. |
A person's height and the person's shoe size. |
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B. |
A person's age, and the address of the person. |
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C. |
The number of miles driven, and the number of gallons of gas in the car. |
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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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