The path of the football can be modeled by y = −.02x^2 + .4x + 1.7 where x is the horizontal distance (in yards) and y is the corresponding height (in yards). Find the maximum height of the football.

Answer 1

y = -0.2x² + 0.4x + 1.7

maximum occurs at x = -b / 2a, or x = -0.4 / 2(-0.2), or x = 1

What is the value of y when x = 1?