y = -16t^2 + 150t + 500
Why can't you plug in the values of t and find y? What do you find so difficult?
y=-16(0)^2 + 150(0) + 500=0 + 0 + 500
y=-16(1)^2 + 150(1) + 500=-16 + 150 + 500
y=-16(2)^2 + 150(2) + 500=-64 +300 +500........Now you can finish your table until you get the value of y to be negative. Then just stop before that happens.
