Chapter 9

Quadratic Functions and Equations


Where's the math?

This photo makes it look easy, but it takes a lot of practice to get very good at basketball.

How hard you shoot the ball can mean the difference between making a basket and missing it. The player may not think about it, but there is an equation that relates the height of a ball or other object over time and the speed it is thrown.

You will use this model and other quadratic equations in this chapter.


Seeing Structure in Expressions

Reasoning with Equations and Inequalities

Interpreting Functions

Big Ideas


Essential Question: What are the characteristics of quadratic functions?

Solving Equations and Inequalities

Essential Question: How can you solve a quadratic equation?


Essential Question: How can you use functions to model real-world situations?

Remind Stream

Wall of Wisdom