The line graphs generated by linear equations are not limited to the portion of the graph shown, but instead continue on infinitely in either direction. Essentially, you are working with a segment of the line graph and a few of the points it contains. We can further analyze the measurements of these line segments through the midpoint formula and the distance formula:

- The midpoint formula measures the midpoint between two
*xy*‐ coordinates.
- The distance formula for graphs measures the distance between two
*xy*‐coordinates.

*Note, do not confuse the distance formula with the formula for distance in distance, rate, and time measurements.*

**Using the Midpoint Formula**

**Using the Distance Formula**

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