1.
Which function has a graph that opens upward?
A.
f
(
x
) = -
x
2
+ 3
x
-12
B.
f
(
x
) = 2
x
2
- 5
x
- 2
C.
f
(
x
) = -5
x
2
-6
x
-3
D.
f
(
x
) = -
x
2
+ 4
x
+ 7
Hint
2.
Find the axis of symmetry of the graph of
f
(
x
) = 4
x
2
-4
x
+ 4.
A.
x
= 2
B.
x
=
C.
y
= 3
D.
x
= 4
Hint
3.
A quadratic function has two real roots. How many times does the graph cross the
x
-axis?
A.
cannot be determined from given information.
B.
0
C.
1
D.
2
Hint
4.
Solve -
x
2
+ 3
x
+ 5 = 0 by graphing. If exact roots cannot be found, state the consecutive integers between which the roots are located.
A.
between 1 and 0, and between 3 and 4
B.
between 1 and 0, and between 4 and 5
C.
between 2 and -1, and between 4 and 5
D.
between 2 and1, and between 3 and 4
Hint
5.
Find the vertex of the graph of the function
.
A.
(1, 4)
B.
(1, 4)
C.
(1, 2)
D.
(1, 2)
Hint