Explanation:
There are two curves on this graph. One that is higher than the other. The higher one is the max and the lower one is the min
Let's find the coordinate of the higher one. Looks like it's at (2,3). This means The function has a maximum of 3 at x=2
The lower on is the same process. Looks like that ons is at (-3,-2). This means The function has a minumum of -2 at x=-3