Quadratic Function Word Problems

Quadratic Function Word Problems

9th Grade

18 Qs

quiz-placeholder

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Quadratic Function Word Problems

Quadratic Function Word Problems

Assessment

Quiz

Mathematics

9th Grade

Hard

Created by

Anthony Clark

FREE Resource

18 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A company's revenue R from selling x items can be modeled by the equation R = -2x2 + 120x - 100. How many items must they sell to maximize their revenue?

15 items

30 items

60 items

120 items

2.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Rafael drops a ball from a third-story window. This equation represents the approximate height, h, in meters, of the ball above the ground after it falls for t seconds.

h = -5t2 + 45

When is the ball at ground level?

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If you square 5 more than a positive number, the result is 88 more than 12 times the number. Find the numbers.

-9 and 7

9 and -7

15 and -5

4.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Your nephew is standing on his deck, which is 4 feet off the ground. He tosses his toy up into the air. The equation h = -2t2 + 7t + 4 models the toy's height, h, from the ground at t seconds after he threw it. How high is the toy after 1 second?

5.

FILL IN THE BLANK QUESTION

1 min • 1 pt

The height, y, of a ball tossed into the air can be represented by the equation

y = −x2 + 10x + 3, where x is the elapsed time. What is the equation of the axis of symmetry of this parabola?

6.

FILL IN THE BLANK QUESTION

1 min • 1 pt

If a toy rocket is launched vertically upward from ground level with an initial velocity of 128 feet per second, then its height h after t seconds is given by the equation h(t) = -16t2 +128t When will the object reach its maximum height?

7.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Media Image

A ball is thrown into the air with an upward velocity of 100 ft/s. Its height, h, after t seconds is given by the function

h = -16t2 + 64t + 960.

How many seconds did it take for the ball to reach its maximum height?

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