The Graph Of A Quadratic Function (Day 1) Examples And Worksheet - Algebra Unit 11-Graphing Quadratics Page 12
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15APPLICATIONS WITH PARABOLIC FUNCTIONS (DAY 7)
EX. 1 Using the graph at the right, It shows the height h
h (height (feet))
in feet of a small rocket t seconds after it is launched.
The path of the rocket is given by the equation:
h = -16t
+ 128t.
2
250
1. How long is the rocket in the air? _________
200
2. What is the greatest height the rocket reaches? ____
150
3. About how high is the rocket after 1 second? _______
100
4. After 2 seconds,
about how high is the rocket?_________
is the rocket going up or going down? ________
50
5. After 6 seconds,
about how high is the rocket? _______
6
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8
1
2
3
4
5
)
time (seconds
is the rocket going up or going down? ________
6. Do you think the rocket is traveling faster from 0 to 1 second or from 3 to 4 seconds?
Explain your answer.
7. Using the equation, find the exact value of the height of the rocket at 2 seconds.
8. What is the domain of the graph?
9. What is the range of the graph?
10. Express the interval over which the graph is increasing.
11. Express the interval over which the graph is decreasing.
12
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