Algebra-2

Based on the graph that the line increases first, then decreases, then increases again, and after increasing to the point (4, 6) it decreases again, the point (4, 6) is a relative maximum.

A relative maximum is a point where the function is greater than the values of the function immediately adjacent to it in a local region. In this case, around the point (4, 6), the function increases towards it and then decreases away from it in its immediate neighborhood, which fits the criteria for a relative maximum.