1.
Use a graphing calculator to graph
y
= 8
x
– 2
x
2
. Estimate the highest point on the graph.
A.
(2, 8)
B.
(8, 2)
C.
(7, 3)
D.
(3, 7)
Hint
2.
Choose the correct graph of
y
= 12
x
– 3
x
A.
B.
C.
D.
Hint
3.
How could you use the graph of
h
= 20
t
– 6
t
2
to estimate the solution(s) of 20
t
– 6
t
2
= 7, where
h
stands for height and
t
stands for time?
A.
Draw a horizontal line at
h
= 7 and find where it intersects the curve.
B.
Draw a vertical line at
t
= 7 and find where it intersects the curve.
C.
Draw a horizontal line at
h
= 20 and find where it intersects the curve.
D.
Draw a vertical line at
t
= 20 and find where it intersects the curve.
Hint
4.
A ball is launched straight up from ground level modeling the equation
h
= 52
t
– 10
t
2
, where
h
stands for height in meters and
t
stands for time. On its way up, it reached a particular height at 1 second. On its way down, it again reached the same height. At approximately what time did it reach that height the second time?
A.
5.2 seconds
B.
3.5 seconds
C.
4.2 seconds
D.
2.0 seconds
Hint
5.
Toby needs to create a rectangular pen for his dog. He decides that the area of the pen will be 100 square feet with its length 2 feet longer than its width. As you find the width of the pen, which solution can be thrown away since the width cannot be negative?
A.
–8.32
B.
–12.32
C.
–11.05
D.
–9.05
Hint