WEBVTT
1
00:00:01.240 --> 00:00:04.750 A:middle L:90%
so if we want to know when it's strictly increasing
2
00:00:04.759 --> 00:00:07.950 A:middle L:90%
than strictly decreasing, then we have to find when
3
00:00:07.960 --> 00:00:11.099 A:middle L:90%
the graph goes up and then goes down it because
4
00:00:11.099 --> 00:00:13.439 A:middle L:90%
it's a strictly increasing, strictly decreasing. We don't
5
00:00:13.439 --> 00:00:15.400 A:middle L:90%
want, like a lab period where there's like nothing
6
00:00:15.410 --> 00:00:17.859 A:middle L:90%
going on. We don't want this and this and
7
00:00:17.870 --> 00:00:20.640 A:middle L:90%
like and then this is a minute that was Overall
8
00:00:20.640 --> 00:00:23.489 A:middle L:90%
, this graph is also increasing and decreasing. With
9
00:00:23.500 --> 00:00:26.289 A:middle L:90%
this middle part. There's like a little bit of
10
00:00:26.289 --> 00:00:28.260 A:middle L:90%
a laugh. So if we want to find when
11
00:00:28.260 --> 00:00:30.899 A:middle L:90%
it goes up and down, well, that looks
12
00:00:30.899 --> 00:00:34.890 A:middle L:90%
like this period right here and that is between forty
13
00:00:34.890 --> 00:00:37.350 A:middle L:90%
and sixty minutes. So we're going to choose B
14
--> A:middle L:90%
.