The following figure, already shown in Section 2.1, Properties of Functions, shows the depth of a sperm whale as a function of time, recorded by researchers at the Woods Hole Oceanographic Institution in Massachusetts.

(a) Find the rate that the whale was descending at the following times.
(i) 17 hours and 37 minutes
(ii) 17 hours and 39 minutes
(b) Sketch a graph of the rate the whale was descending as a function of time.

Transcribed Image Text:

Depth (meters) 100 200 300 400 17:35 17:37 17:39 Time (hours:minutes) 17:41