Identify any relative maxima or minima and intervals on whic

Identify any relative maxima or minima and intervals on which the function is decreasing and increasing.

Solution

Maxima at (x, y) = ( 1, -1) ; we can see graph increases before the point and graph decreases after

the point.

So, Interval of increase ( -inf , 1) , Interval of decrease (1,5)

Relative minima at (x, y) = (5, -10); we can see graph decreases before this point and increase after

this point ( 5 , inf)