00:01
So you have a function that's telling us about the dc population and telling us that it grew from 1990 to 1950.
00:08
It stayed the same from 1950 to 1960, and it fell from 1960 to 2005.
00:15
And we are being asked to graph this population, but we need to do as a function of years since 1990.
00:21
So let's start with that.
00:23
So this is going to be our time axis, because whenever you have time involved, it pretty much always goes on that axis.
00:31
Remember t is not just the year, it's the years since 1900.
00:41
And then up here we're just going to have the population.
00:44
That's a pretty simple axis.
00:48
And we're being asked how it's, how is graph going to end up looking.
00:52
So let's start year zero or t equals zero, which is actually the year 1900.
00:57
So we have some population there, that we don't start with zero population.
01:01
It's fair to say that there is some population.
01:02
It's fair to say that there is some population.
01:03
In washington, d .c.
01:06
During the year 1900.
01:08
And then let's start labeling our axes real quick.
01:10
Let's say that this right here is t equals 50 for 1950...