Which function is an odd function?

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

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

Can someone me out here and the tell me the greatest common factor