1.
Determine which equation represents a function.
A.
x
=
y
2
- 1
B.
C.
y
= -2
x
+ 1
D.
x
= 4
Hint
2.
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.
64
B.
20
C.
42
D.
212
Hint
3.
Consider the function
f
(
x
) = -2(
x
+ 8). Is this function a linear function? Why or why not?
A.
Yes, the coefficient of
x
is not zero.
B.
No,
f
is not a function.
C.
No, the function cannot be written in the form
f
(
x
) =
mx
+
b
.
D.
Yes, the function can be written in the form
f
(
x
) =
mx
+
b
.
Hint
4.
Given
find ?
A.
9
B.
10
C.
–12
D.
–9
Hint
5.
Given
find
A.
–7
B.
1
C.
–1
D.
7
Hint