A slingshot shoots a ball across a field. the ball follows a parabolic path which can be represented by the
function s(t) =- 4t? + 16t, where t is time, in seconds, and s(t) is the height of the ball off the ground in
feet.

a.) what is the y-intercept and what does it mean in the context of the problem?

b.) determine how long the ball is in the air to the nearest second.

c.) what is the vertex and what do the coordinates mean in the context of the problem?