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Quadratic Functions Solutions and Word Problems

Authored by Anthony Clark

Mathematics

9th Grade

CCSS covered

Quadratic Functions Solutions and Word Problems
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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

You are cliff diving with some friends. Your path to the water is modeled by h(t) = -16t2 + 8t +24. How long will it take for you to hit the water? What are you solving for?

roots

axis of symmetry

y-value of the vertex

y-intercept

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A model rocket is launched from the ground and it's path is modeled by the function h(t) = -16t2 + 96t. What are you solving for?

x-intercept

y -intercept

vertex

axis of symmetry

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A dolphin jumps from the water. The function h(t) = -16t2 + 80t models the dolphin's height at any given time, t. What is the maximum height the dolphin jumps? What are you solving for?

solutions

y-intercept

axis of symmetry

y-value of the vertex

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

An object in launched in the air is modeled by the function

s(t) = –16t2 + 64t + 80, where t is the time in seconds. From what height was the object launched? What are you solving for?

zeros

axis of symmetry

y-intercept

y-value of the vertex

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The sum of a number and its square is 72. Find the number(s).

8 or 9

8 or -9

-8 or 9

-8 or -9

Tags

CCSS.HSA-REI.B.4B

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A ball is thrown into the air. Its height in feet after t seconds is given by the function h(t) = –5t2 + 20t. How high will the ball be after 3 seconds?

20 ft

15 ft

5 ft

10 ft

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The height of a ball that is thrown into the air is given by h(t) = -5t2 + 40t + 2. From what height was the balloon released?

2 meters

4 meters

5 meters

8 meters

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