| |
| |
1. |
If y varies directly as x and y = 21 when x = 5, find x when y = 42. |
| |
|
A. |
10 |
B. |
5 |
| |
|
C. |
21 |
D. |
4.2 |
| |
|
Hint |
|
| |
2. |
Jim's wages vary directly as the numbers of hours he works. For 7 hours, he makes $38.85. How much will he make in 37 hours? |
| |
|
A. |
$207.20 |
B. |
$194.25 |
| |
|
C. |
$1437.45 |
D. |
$205.35 |
| |
|
Hint |
|
| |
3. |
Determine the value of r so that the line through (r, 4) and (-7, 7) has a slope of  . |
| |
|
 |
| |
|
A. |
3 |
B. |
-3 |
| |
|
C. |
9 |
D. |
-11 |
| |
|
Hint |
|
| |
4. |
Write the standard form of an equation of the line that passes through
(-2, 5) and has an undefined slope. |
| |
|
A. |
x - y = 3 |
B. |
-2x + 5y = 0 |
| |
|
C. |
y = 5 |
D. |
x = -2 |
| |
|
Hint |
|
| |
5. |
Write the point-slope form of an equation of the line that contains  , which is the hypotenuse of the right triangle. |
| |
|
 |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
6. |
Find the slope of the line that passes through (-2, 9.5) and (4, 5). |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
0 |
D. |
undefined |
| |
|
Hint |
|
| |
7. |
Write an equation of the line shown in the graph. |
| |
|
 |
| |
|
A. |
y = -2x – 5 |
B. |
y = 2x + 5 |
| |
|
C. |
y = 2x – 5 |
D. |
y = -2x + 5 |
| |
|
Hint |
|
| |
8. |
Graph 7x + 2y = -12. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
9. |
Which equation describes the line that contains the points (-1, -8) and (-9, -21)? |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
10. |
Which equation describes the line that contains the points (7, 17) and (15, 33)? |
| |
|
A. |
 |
B. |
y = 2x + 3 |
| |
|
C. |
y = -2x + 31 |
D. |
 |
| |
|
Hint |
|
| |
11. |
Write the slope-intercept form of an equation for the line that passes through (-8, -1) and is parallel to the graph of  |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
12. |
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. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
13. |
Which relationship would most likely have a negative correlation? |
| |
|
A. |
The number of miles driven, and the number of gallons of gas in the car. |
| |
|
B. |
A person's age, and the address of the person. |
| |
|
C. |
The number of pizzas ordered, and the total price of the bill. |
| |
|
D. |
A person's height and the person's shoe size. |
| |
|
Hint |
|
| |
14. |
Which relationship would most likely have no correlation? |
| |
|
A. |
The number of pizzas ordered, and the total price of the bill. |
| |
|
B. |
A person's age, and the address of the person. |
| |
|
C. |
A person's height and the person's shoe size. |
| |
|
D. |
The number of miles driven, and the number of gallons of gas in the car. |
| |
|
Hint |
|
|
|