Answer:
(13, 20)
Explanation:
From the graph, there are three points at which the height of the drone starts decreasing.
The points are:
• (9, 15)
,
• (13,20)
,
• (18,15)
However, observe that of these points, the only point where the height of the drone switched from increasing to decreasing is (13, 20).
The required point is (13, 20).