1.
Determine which equation represents a function.
A.
y
= -2
x
+ 1
B.
x
= 4
C.
x
=
y
2
- 1
D.
Hint
2.
In a science experiment, students hung a cup from a spring and measured the length of the spring when candies were added to it. Their data are shown in the table below. Which statement is true?
A.
The relation is not a function because there are two
y
values for some
x
values.
B.
The relation is not a function because only a line can be a function.
C.
The relation is a function because the range values increase.
D.
The relation is a function because for each
x
value, there is exactly one
y
value.
Hint
3.
Find the
y
-intercept of the graph of 2
x
- 5
y
= 10.
A.
2
B.
0
C.
-2
D.
5
Hint
4.
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
5.
The table below shows the land-speed records to the nearest mile per hour. Draw a scatter plot for the data and use it to predict the approximate land-speed record for the year 2005. Assume the rate of increase of speed records remains the same.
A.
830 mph
B.
600 mph
C.
980 mph
D.
700 mph
Hint
6.
Identify
h
(
x
) = [
x
] + 4.
A.
direct variation function
B.
greatest integer function
C.
constant function
D.
absolute value function
Hint
7.
Write an inequality to describe all the points on the coordinate plane
above
y
= -4.
A.
y
> 4
B.
y
< 4
C.
y
< -4
D.
y
> -4
Hint
8.
The temperature in degrees Fahrenheit can be expressed by the function
F
(
c
) = 1.8
c
+ 32 where
c
is the temperature in degrees Celsius. Find the temperature in degrees Fahrenheit (to the nearest degree) if it is 18°
C
outside.
A.
20
B.
64
C.
42
D.
212
Hint
9.
Choose the line that has a slope of zero.
A.
B.
C.
D.
Hint
10.
Find the slope of the line below.
A.
B.
C.
D.
Hint
11.
What is the
y
-intercept of the graph of the line with equation
A.
-7
B.
7
C.
D.
Hint
12.
A scatter plot is __________.
A.
a table of data
B.
a set of data graphed as ordered pairs in a coordinate plane
C.
a line graph
D.
a line graphed in a portion of Quadrant I of the coordinate plane
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.
absolute value function
B.
constant function
C.
step function
D.
identity function
Hint
14.
What is the inequality represented in the graph?
A.
x
+ 2
y
> 4
B.
x
+ 2
y
4
C.
x
+ 2
y
> 4
D.
x
+ 2
y
4
Hint