Evaluate 15r−1\dfrac {15}r-1 r 15 −1 start fraction, 15, divided by, r, end fraction, minus, 1 when r=5r=5 r=5

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In two or more complete sentences, determine the appropriate model for the given data and explain how you made your decision. (1,-1), (2,0.5), (5,1.5), (8,2)

Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.