Suppose customers in a hardware store are willing to buy n(p) boxes of nails at p dollars per box, as given by the following function.
n(p) = 80 - 4p^2 ; 1 < = p < = 4.
find the average rate of change in the number of boxes of nails that customers are willing to buy (demand) for a change in price from $2 to $3.
the average rate of change of demand for a change in price from $2 to $3 is boxes per dollar.
(type an integer or a decimal.)
i know the answer (-20) but i am not sure how to get it. can you ?

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Igure 1 and figure 2 are two congruent parallelograms drawn on a coordinate grid as shown below: 4 quadrant coordinate grid showing two parallelograms. figure 1 has vertices at negative 5, 2 and negative 3, 4 and negative 4, 7 and negative 6, 5. figure 2 has vertices at 5, negative 2 and 7, negative 4 and 6, negative 7 and 4, negative 5. which two transformations can map figure 1 onto figure 2? reflection across the y-axis, followed by reflection across x-axis reflection across the x-axis, followed by reflection across y-axis reflection across the x-axis, followed by translation 10 units right reflection across the y-axis, followed by translation 5 units down