9-2 Solve It!
Height (ft)
Be careful! The
graph shows the
height of the ball,
not the path of
the ball.
You throw a ball straight up into the air and
catch it at the same height you released it.
The parabola at the right shows the height
h of the ball in feet after t seconds. What
is the total distance the ball travels? For
how long does the ball travel up? Explain your
reasoning.
16
8
0
0
1
2
Time (s)
9-2 Lesson Quiz
1. What is the graph of the function y 5 2x2 1 4x 1 1?
2. Do you UNDERSTAND? Tyrone launches a toy rocket into
the air with an initial upward velocity of 49 ft/s and an initial
height of 0 ft. How long will it take the rocket to reach its
maximum height? How high above the ground will it be?
What is the range of the function? Why is there a maximum
point on the graph of this function?
Answers
Lesson Quiz
Solve It
0541_hsm11a1seNA_0902.indd
32 ft; 1 s; explanations may
541
vary.
2. 1.53 s; 37.5 ft;
0 # h # 37.5; The rocket
will continue to travel 2/26/09 5:58:10 PM
upwards until gravity pulls it
back to earth, so there is a
maximum point on the graph
which opens downward.
y
1.
6
4
2
O
2
x
2
4
6
2
Prentice Hall Algebra 1 • Solve It/Lesson Quiz on Transparencies
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