Help me answer this please!!

How do you solve a question like this?

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need