Holly plays tennis on the school tennis team. She can hit a tennis ball really high in the air. She learned
that the quadratic equation below could be used to
determine the height of a tennis ball after it was hit
with a tennis racket.
y = -6x2 + 36x
She defined the variables for us:
y = the height of the tennis ball in feet
x = seconds after the ball is hit with the i
How long does it take for the ball to hit the ground
in seconds?