1.
Choose the graph that is not a function.
A.
B.
C.
D.
Hint
2.
Determine which equation represents a function.
A.
B.
x
= 4
C.
y
= -2
x
+ 1
D.
x
=
y
2
- 1
Hint
3.
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 a function because the range values increase.
B.
The relation is not a function because only a line can be a function.
C.
The relation is a function because for each
x
value, there is exactly one
y
value.
D.
The relation is not a function because there are two
y
values for some
x
values.
Hint
4.
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.
63°F
D.
111°F
Hint
5.
Graph the relation represented by
y
=
x
2
–
x
+ 1.
A.
B.
C.
D.
Hint