1.
Determine which equation represents a function.
A.
B.
y
= -2
x
+ 1
C.
x
=
y
2
- 1
D.
x
= 4
Hint
2.
Which function is not linear?
A.
f
(
x
) = 14
x
+ 7
B.
f
(
x
) = 2
x
3
C.
f
(
x
) = 8
D.
Hint
3.
When Kristin works 8 hours, she earns $60. When she works 20 hours, she earns $150. Write a linear equation that describes her earnings. Assume that the changes increase linearly.
A.
B.
C.
D.
Hint
4.
Identify
h
(
x
) = [
x
] + 4.
A.
absolute value function
B.
constant function
C.
direct variation function
D.
greatest integer function
Hint
5.
Choose the graph of
A.
B.
C.
D.
Hint
6.
Graph the relation represented by
y
=
x
2
–
x
+ 1.
A.
B.
C.
D.
Hint
7.
When the equation
is written in standard form, what is the value of
B
?
A.
25
B.
C.
-25
D.
Hint
8.
Graph the line through (2, 3) that is parallel to the line with equation 3
x
–
y
= 2.
A.
B.
C.
D.
Hint
9.
Choose the line that has a slope of zero.
A.
B.
C.
D.
Hint
10.
What is the slope of the line with equation
A.
7
B.
C.
-7
D.
Hint
11.
For which scatter plot will a good line of fit have a negative
y
-intercept?
A.
B.
C.
D.
Hint
12.
The table shows the average heights (in centimeters) of females ages 1-14. If this trend continues, about how tall will an average fifteen-year-old female be?
A.
163.7 cm
B.
160.3 cm
C.
168.5 cm
D.
156.9 cm
Hint
13.
Suppose a plant grows one inch every year. If
x
is how old the plant is (in years), and
f
(
x
) is how tall the plant is (in inches), what type of function is
f
(
x
)?
A.
constant function
B.
step function
C.
identity function
D.
absolute value function
Hint
14.
Which graph shows the inequality 5
x
– 2
y
8?
A.
B.
C.
D.
Hint