1.
Which graph represents a function?
A.
B.
C.
D.
Hint
2.
Consider a function machine that gives the positive square root of the input. If the input is
, what is the output?
A.
B.
C.
D.
Hint
3.
Find the domain of the function.
A.
all real numbers except –1
B.
all real numbers
C.
all real numbers except 1
D.
all real numbers except 0
Hint
4.
A flare is shot up into the sky modeling the formula
h
(
t
) = 2 + 144
t
– 16
t
2
, where h is in feet and t is in seconds. About how long was the flare in the air?
A.
9 seconds
B.
2.5 seconds
C.
5 seconds
D.
4.5 seconds
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.
B.
l
= 50 –
w
C.
lw
= 50
D.
l
+
w
= 50
Hint