Mary sells bottles of lemonade. The demand function for her lemonade is given by D(q)=100−1.5q,
and the supply function is
S(q)=0.75q,
where q is the quantity of bottles produced. What is the value of the supply function at the equilibrium point? Give your answer to the nearest integer.

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.

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