| |
| |
1. |
Given the function f(x) = x2 + 9, find f(-3). |
| |
|
A. |
12 |
B. |
6 |
| |
|
C. |
18 |
D. |
0 |
| |
|
Hint |
|
| |
2. |
Which function is not linear? |
| |
|
A. |
f(x) = 2x3 |
B. |
f(x) = 14x + 7 |
| |
|
C. |
 |
D. |
f(x) = 8 |
| |
|
Hint |
|
| |
3. |
The temperature f(x) of water in a lake in degrees Fahrenheit is estimated by the function shown below, where x is the depth in feet of the water. What would be the temperature of water 30 feet below the surface? |
| |
|
 |
| |
|
A. |
33°F |
B. |
71.25°F |
| |
|
C. |
111°F |
D. |
63°F |
| |
|
Hint |
|
| |
4. |
Write an equation of the line that passes through (10,-4) and is perpendicular to the line whose equation is  |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
5. |
A best-fit line drawn on a scatter plot ________ |
| |
|
A. |
must be drawn through the first and last data points. |
| |
|
B. |
is a line that goes through every data point. |
| |
|
C. |
approximates the linear relationship of data points. |
| |
|
D. |
always has a positive slope. |
| |
|
Hint |
|
| |
6. |
A best-fit line is drawn on a scatter plot showing the average daily temperature and the number of people at a public swimming pool. The slope of the line would probably be ________ |
| |
|
A. |
zero. |
B. |
negative. |
| |
|
C. |
undefined. |
D. |
positive. |
| |
|
Hint |
|
| |
7. |
Identify h(x) = [x] + 4. |
| |
|
A. |
absolute value function |
| |
|
B. |
constant function |
| |
|
C. |
greatest integer function |
| |
|
D. |
direct variation function |
| |
|
Hint |
|
| |
8. |
Choose the graph of f(x) = |x| - 2. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
9. |
State which ordered pair satisfies  |
| |
|
A. |
(0, 1) |
B. |
(1, 2) |
| |
|
C. |
(0, 0) |
D. |
(1, 5) |
| |
|
Hint |
|
| |
10. |
Consider the formula F(c) = 1.8c + 32, where c is the temperature in degrees Celsius and F(c) is the temperature in degrees Fahrenheit. If it is 0° C at the beginning of the day, and it is 11° C at noon, what was the change in temperature in degrees Fahrenheit? |
| |
|
A. |
19.8 |
B. |
51.8 |
| |
|
C. |
-12.2 |
D. |
11 |
| |
|
Hint |
|
| |
11. |
Choose the line that has a slope of zero. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
12. |
Find the slope of the line below. |
| |
|
 |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
13. |
What is the slope of the line with equation  |
| |
|
A. |
7 |
B. |
 |
| |
|
C. |
-7 |
D. |
 |
| |
|
Hint |
|
| |
14. |
Choose the ordered pair that satisfies 7x – 15y < -13. |
| |
|
A. |
(1, 1) |
B. |
(2, -3) |
| |
|
C. |
(0, -2) |
D. |
(-2, 0) |
| |
|
Hint |
|
|
|