Modeling Quadratics

TEK A.8 (B)

• d(x) = 0.05x² + 0.74x

• d(x) = 0.05x² + 0.74x + 9.17

• d(x) = 0.26x² – 3.11x

• d(x) = 0.26x² – 3.11x + 1

Click on the picture.

• F

• G

• H

• J

TEK A.8 (B)

• d(x) = 0.05x² + 0.74x

• d(x) = 0.05x² + 0.74x + 9.17

• d(x) = 0.26x² – 3.11x

• d(x) = 0.26x² – 3.11x + 1

Q32

• y = 0.001x² - 0.426x + 35.672

• y = -0.60x² + 348.1x - 334.2

• y = 0.001x² + 35.672

• y = -0.60x² - 334.2

• A

• B

• C

• D

A baseball coach records the height at every second of a ball thrown in the air. Some of the data appears in the table. Which equation is a quadratic model for the data?

The data can be modeled by the quadratic function

y = ​ (a)  

Mikkel threw a foam soccer ball in the air. Cameron wanted to find out how high the soccer ball got given that it took 1 second to get to its highest point.

Which one are we looking for?

• x at vertex

• y at vertex

• positive zero

An object in launched directly upward at 64 feet per second (ft/s) from a platform 80 feet high. Its height is represented by the equation 
s(t) = –16t² + 64t + 80.
What will be the object's maximum height? 

• 2 ft

• 80 ft

• 144 ft

• 64 ft