A football is thrown, by a quarterback, to a receiver 40 yards away. The formula
y = -0.025x^2 + x + 5 models the football's height above the ground, y, in feet, when it is x yards from the quarterback. How many yards from the quarterback does the football reach its greatest height? What is that height?
keywords : find, finding, calculating, calculate, determine, determining, verify, verifying, evaluate, evaluating, calculate, calculating, prove, proving
The vertex of a parabola is found. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.