00:01
In problem number 29, we're given a graph, which you can see up into the right, and we're also given some information about long lake in 1998.
00:08
So what it says is that the temperature in degrees celsius of the lake in 1998 is a function of depth and time of year.
00:17
So we can see that the days of 1998, that is the time of year, that is our x variable, and the depth in meters is our y variable on our y axis.
00:28
So the question is asking us to estimate the temperature in the lake on june 9th and on june 29th.
00:35
So we're going to write that down.
00:37
We've got june 9th, which is day 160, and they tell us they want us to estimate the temperature at a depth of 10 meters on that day.
00:47
They also want us to find the temperature, estimate the temperature on day 180 at a depth of 5 meters.
00:57
So on the graph, our y -axis is the depth.
01:00
We can see that here.
01:02
And the x -axis is the day of 1998.
01:05
So what we're going to do is we're going to find our graph, the day 160, and follow that up until we reach the depth of 10 meters on our y -axis...