The relative maximums of the graph is at point x=-8 and at x= 2.2.
Relative maximum point is a point where the function changes direction from increasing to decreasing. Which makes the point a peak of the graph.
In the given graph there are two peak points which are (-8,5) and (2.2,3.9) which are the largest point on the graph in some interval around the point.
Thus the function has,
Relative maximums of 5 at x=-8
And, Relative maximums of 3.9 at x=2.2
Hence the relative maximums of the graph are at x= -8 and x= 2.2.
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