The graph below shows the temperature one Christmas day of a Heat-Kit Bakeoven, a wood-burning oven for baking. The oven was lit at 8:30 a.m. Let T(x) be the temperature x hours after 8:30 a.m.

(a) Find and interpret T′(0.5).
(b) Find and interpret T′(3).
(c) Find and interpret T′(4).
(d) At a certain time a Christmas turkey was put into the oven, causing the oven temperature to drop. Estimate when the turkey was put into the oven.

Transcribed Image Text:

Temperature 500⁰ 400⁰ 300⁰ _ 200⁰ 100⁰ 0⁰ 8:30 9:00 9:30 10:00 10:30 11:00 11:30 12:00 12:30 1:00 Time