1.
Which graph represents a function?
A.
B.
C.
D.
Hint
2.
If
f
(
n
) = -6
n
+ 2, find
f
.
A.
8
B.
9
C.
4
D.
-3
Hint
3.
Find the domain of the function.
A.
all real numbers
B.
all real numbers except 0
C.
all real numbers except 1
D.
all real numbers except –1
Hint
4.
Hector needs to build a rectangular pen for his dog. He decides to use an area of 50 m
2
in his backyard for the pen. Using l for the length and w for the width, express the area in terms of the two variables.
A.
l
+
w
= 50
B.
lw
= 50
C.
w
= 50 –
w
D.
Hint
5.
Hector needs to build a rectangular pen for his dog. He decides to use an area of 50 m
2
in his backyard for the pen. Using
w
for the width, find a function
f
(
w
) that represents the perimeter of the fence in terms of
w
.
A.
l
+
w
= 50
B.
C.
l
= 50 –
w
D.
lw
= 50
Hint