Is f(x) = 0.5^x a exponential function?

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Give all possible names for the line shown. calculation tip: lines can be written with either point first.

Add the fractions and simplify 1/2+ 1/3