In the year 1997, the surface elevation of Lake Powell was 3899 feet above sea level. In the year 2004, the surface elevation of Lake Powell was 3353.7 feet above sea level. Interpret the rate of change in this situation.
The surface elevation of Lake Powell is either decreasing or increasing and
at a rate of feet every 7 years? feet per year? feet? or years? choose one

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step-by-step explanation:

part a: 1.08

part b: 27.59

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.