Lesson 4

Tables, Equations, and Graphs of Functions

Lesson Narrative

In this lesson, students work with graphs and tables that represent functions in addition to the equations and descriptions used previously. They learn the conventions of graphing the independent variable (input) on the horizontal axis and the dependent variable (output) on the vertical axis and that each coordinate point represents an input-output pair of the function.

By matching contexts and graphs and reading information about functions from graphs and tables, students become familiar with the different representations and draw connections between them.

Learning Goals

Teacher Facing

  • Identify an output for a given input, and the input(s) for a given output, from the graph of a function.
  • Interpret points on the graph of a function.
  • Understand and make connections between equations and graphs of functions.

Student Facing

Let’s connect equations and graphs of functions.

CCSS Standards

Addressing

  • 8.F.A.1
  • 8.F.A.3

Glossary Entries

  • dependent variable

    A variable representing the output of a function.

  • independent variable

    A variable representing the input of a function.