1.
Which is the standard form of a linear equation?
A.
B.
3
x
2
+
y
= 5
C.
4
x
- 9
y
= 1
D.
y
= 2
x
- 3
Hint
2.
Which equation is graphed below?
A.
x
+ 3
y
= 6
B.
3
x
+
y
= 6
C.
3
x
-
y
= -6
D.
x
- 3
y
= -6
Hint
3.
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.
42
B.
212
C.
64
D.
20
Hint
4.
Consider the function
f
(
x
) = -2(
x
+ 8). Is this function a linear function? Why or why not?
A.
Yes, the function can be written in the form
f
(
x
) =
mx
+
b
.
B.
No, the function cannot be written in the form
f
(
x
) =
mx
+
b
.
C.
No,
f
is not a function.
D.
Yes, the coefficient of
x
is not zero.
Hint
5.
Consider the formula
F
(
c
) = 1.8
c
+ 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.
51.8
B.
19.8
C.
-12.2
D.
11
Hint