00:01
So we have a graph that represents katie's distance from home in miles.
00:07
So we've got the point zero zero, and then we've got 4 .4 as a clear point.
00:20
And then from four to eight, we remain there.
00:26
We have this constant piece.
00:28
And then from 8 to 12, 12 we're at one.
00:34
So we have this piece.
00:40
Okay.
00:41
Now, in a, we want to know what does zero, zero mean.
00:48
Okay, so this is time.
00:51
So at time zero, at time zero minutes, she is zero miles away from home.
01:10
In other words, she's home.
01:12
And b, i want to know during which part of the trip is katie traveling the fastest.
01:24
So let's find the slope of these two segments.
01:28
Let's go first between 0 and 4 .4.
01:38
Change in y is 0 .4 minus 0 over 4 minus 0.
01:44
0 .4 divided by 4 is going to give me 0 .1.
01:53
So that tells me she's traveling at a speed of 0 .1 miles per minute...