# Lesson Plan: Slope and Rate of Change Mathematics • 8th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to interpret the slope of a straight line as the rate of change of two quantities.

#### Objectives

Students will be able to

• recall the formula for calculating the slope of a straight line,
• understand how slope is related to the rate of change of two quantities,
• calculate the rate of change of two quantities in a linear relationship given
• two points that the line passes through,
• an input–output table,
• a graph,
• determine whether a slope is positive, negative, 0, or undefined,
• compare multiple linear relationships and their rates of change.

#### Prerequisites

Students should already be familiar with

• linear equations, functions, and graphs,
• identifying whether a relationship is linear.

#### Exclusions

Students will not cover

• the relationship between slopes of parallel and perpendicular lines,
• equations of lines.