The following data represent the revenue R (in dollars) received from selling x wristwatches at Wilk’s Watch Shop

(a) Find the average rate of change of revenue from x = 25 to x = 130 wristwatches. 

(b) Find the average rate of change of revenue from x = 25 to x = 90 wristwatches. 

(c) Find the average rate of change of revenue from x = 25 to x = 50 wristwatches. 

(d) Using a graphing utility, find the quadratic function of best fit. 

(e) Using the function found in part (d), determine the instantaneous rate of change of revenue at x = 25 wristwatches.  

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Wristwatches, x Revenue, R 25 2340 3600 40 4375 50 6975 90 130 8775 160 9600 10,000 200 220 9900 9375 250