69) A local coffee shop models the number of customers in its shop according to the time of day (t-0 corresponds to the opening time of 5:00 a.m.) by counting customers at certain times and taking the average mumber of customers over a one-month period. The coffee shop uses the polynomial regression N()--0.07-0.04+ 5.21+ 30 with coefficient of determination - 0.94 Is this model appropriate for t values between O and 107 a) Yes, this model is appropriate because the number of customers is concave down between t0 and t 10. b) No, this model is not appropriate because this data should be modeled by a lincar function e) No, this model is not appropriate because this data should be modeled by a logistic function. d) Yes, this model is appropriate because this data should be modeled by a polynomial, and the function fits the data strongly.

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