Answer:
A. (-1,8)
Step-by-step explanation:
We know that,
<em>Relative maximum/minimum </em><em>at a point 'c' is obtained by equating the derivative of a function to 0.</em>
<em>As the derivative of a function at a point represents the tangent line at the point which is parallel to x-axis.</em>
So, in order to find the relative maximum, we will find the highest point at which the tangent is parallel to the x-axis.
Since from the graph, we see that,
The point (-1,8) is the highest point such that tangent is parallel to the x-axis.
We get, (-1,8) is the relative maximum point.
Thus, option A is correct.