1.
Which function has a graph that opens upward?
A.
f
(
x
) = 2
x
2
- 5
x
- 2
B.
f
(
x
) = -
x
2
+ 4
x
+ 7
C.
f
(
x
) = -5
x
2
-6
x
-3
D.
f
(
x
) = -
x
2
+ 3
x
-12
Hint
2.
Find an equation for the parabola shown in the graph.
A.
y
= (
x
- 2)
2
+ 4
B.
y
=
(
x
- 2)
2
- 4
C.
y
= (
x
+ 2)
2
- 4
D.
y
=
(
x
+ 2)
2
- 4
Hint
3.
Which of the following functions will have the widest graph?
A.
y
= 3
x
2
– 8
B.
y
=
x
2
+3
x
+ 1
C.
y
=
x
2
+
x
– 3
D.
y
= –2
x
2
+ 5
x
– 1
Hint
4.
Find the vertex of the graph of the function
.
A.
(–1, –2)
B.
(1, 4)
C.
(–1, 4)
D.
(1, –2)
Hint
5.
Find the axis of symmetry of the following function:
A.
x
=
B.
x
= 7
C.
x
= –7
D.
x
=
Hint