Create a table of values with at least three points for the equation y = x + 4.

Example: x = -1, y = 3; x = 0, y = 4; x = 1, y = 5

Explain how plotting the points from a table of values helps you graph a linear equation.

Each x and y value that satisfies the equation represents a point on the line. Plotting these points and connecting them creates the visual representation of the linear equation.

Graphing Linear Equations with Tables

8th Grade•55 minutes•CCSS 8.F.A.3

Learning Objective

I can graph a linear equation on a coordinate plane using a table of values.

Key Concepts

To graph a linear equation using a table of values, you can select any x value and substitute it into the equation to find the corresponding y value.

It is best practice to find at least three points when graphing a line; if the points don't form a line, you know you've made an error.

After plotting the points from your table of values, draw a line that passes through all the points to represent the graph of the linear equation.

Practice Questions

This lesson includes 12 practice questions to reinforce learning.

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1. What is the minimum number of points you should find when graphing a line using a table of values, and why?

2. Suppose you are graphing the equation y = 3x - 2 using a table of values. If you choose x = 2, what is the corresponding y-value?

3. When using a table of values to graph a line, can you choose any x-values you want?

...and 9 more questions

Educational Video

Ex 1: Graph a Linear Equation Using a Table of Values

Mathispower4u

Learning Objective

Key Concepts

Practice Questions

Educational Video

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