Danny tosses a ball into the air. Its height, as a function of time, is
modeled by y = -16x2 +9x +4. Which statement best describes the
function? (SIDE NOTE: This is not a test, for the last time this isn't a test to me brainly)

1. The function is linear.

2. The function is linear at some points and nonlinear at other points.

3. The function is nonlinear

4. Not enough information is given to decide.​