To make the process faster

To check for errors in calculations

To ensure the line is straight

To make the graph more colorful

It is always the midpoint

It simplifies calculations

It makes the graph symmetrical

It is the only value that works

Plotting the points on the graph

Finding the slope of the line

Recording the output values in a table

Writing the equation in slope-intercept form

By subtracting the output from the input

By multiplying the input and output values

By pairing each input with its corresponding output

By adding the input and output values

To create a triangle

To ensure the points form a straight line

To find the midpoint of the line

To make the graph more detailed