00:01
Okay, so in this function we have a graph of the derivative of a function f.
00:06
We have the graph of f prime of x.
00:09
And we want to know using this graph which one of these statements are true.
00:17
If any of these statements are true.
00:22
So first, let's take a look at the first one.
00:24
The function f is decreasing between zero and two.
00:28
Now, how will we know that? well, we know that the function f will be decreasing.
00:35
So let's do our analysis.
00:38
F is decreasing if f prime is negative.
00:49
So if the derivative is negative, then the function is decreasing now.
00:55
So between the interval 0 and 2 in that area here, between 0 ,000, 0 and 2, we can see that the value of f prime of x, they're all below 0.
01:19
So because f prime of x is negative for x between 0 and 2, then f of x decrease, between 0 and 2...