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.


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.


Students should already be familiar with

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


Students will not cover

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

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.