Question

http://prntscr.com/bgydsd

Answer 1

@AloneS

Answer 2

@jim_thompson5910 @jtug6

Answer 3

So, at first the girl is going slow so your rate of change is also going to be slow. Recall Rate of change is also called the slope of a line. So think about a hill, the steeper the slope the faster something rolls down it. So at first you have a slow not so steep slope, then you stop to pet the kitten so your rate of change is zero, or in other words there is no slope so its a straight line. Then when it starts raining you book it so your slope becomes large. Here it is represented visually.