This type of essay answer is pretty short.
You play out the equation and say what each part of the equation means. The vertex in this case, because it's a downward facing parabola, is the highest point on the graph. Now since they're kicking a ball, the vertex will be the highest point that the ball will go up to.
Hopefully this helps some. For full points you'll probably have to add a bit of padding and further explanation.
First we need to change a decline of 8.6% to a decimal, which is 0.914 (100% - 8.6%). With an initial value of 1500 we get:
Answer: (-2,4), because it is the point of intersection of the two graphs
Step-by-step explanation:
i did it
the first answer is correct