Select all that apply to the concept of a residual. (Image is attached) Please help!!!

What is this equation in point-slope form?

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

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?