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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. |
4.2 |
B. |
10 |
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C. |
5 |
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. |
1 |
B. |
3 |
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C. |
2 |
D. |
6 |
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Hint |
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3. |
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. |
3x + y = -9 |
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C. |
3x + y = -3 |
D. |
y = -3x - 9 |
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Hint |
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4. |
Write the standard form of the equation of the line that passes through
(-2, -3) and (2, -5). |
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A. |
x + 2y = -8 |
B. |
2x - y = -1 |
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C. |
x - 2y = -8 |
D. |
2x + y = -7 |
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Hint |
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5. |
Which equation has a graph perpendicular to the graph 3y = 2x - 9? |
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A. |
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B. |
2x + 3y = 4 |
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C. |
3x + 2y = 7 |
D. |
y = 2x + 5 |
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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. |
8y = - 6x |
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B. |
3x + 4y = -16 |
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C. |
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D. |
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Hint |
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7. |
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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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. |
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. |
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B. |
y = -2x + 31 |
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C. |
y = 2x + 3 |
D. |
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Hint |
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11. |
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 increases. |
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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 decreases, the value of y decreases. |
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Hint |
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12. |
Which relationship would most likely have a negative 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 height and the person's shoe size. |
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C. |
The number of pizzas ordered, and the total price of the bill. |
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D. |
A person's age, and the address of the person. |
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Hint |
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13. |
Which of the following pairs of coordinates are on a line with an undefined slope? |
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A. |
(-4, -3), (3, -3) |
B. |
(3, -2), (3, 5) |
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C. |
(2, 1), (5, -2) |
D. |
(-2, -2), (4, 4) |
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Hint |
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14. |
If Dale Jarrett drives his car 1760 feet on the racetrack in 6 seconds, about how long will it take him to drive 2640 feet, a half mile? |
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A. |
18 minutes |
B. |
6 minutes, 40 seconds |
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C. |
9 seconds |
D. |
18 seconds |
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Hint |
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