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