How do you determine a rate of change with a graph

When graphed, rate of change can be referred to the slope, or

.

The slope can be found using the formula:

m =

is equal to how the Y and X values change from a given point.

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step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.