1.
Which graph represents a function?
A.
B.
C.
D.
Hint
2.
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
= 50 –
w
B.
C.
l
+
w
= 50
D.
lw
= 50
Hint
3.
Find the
x
-intercepts of the graph of
f
(
x
) =
x
2
– 2
x
– 3.
A.
–1, 4
B.
1, –3
C.
–1, 3
D.
1, –4
Hint
4.
How many solutions does the equation have?
x
2
– 6
x
+ 8 = 2
x
– 3
A.
3
B.
0
C.
1
D.
2
Hint