Please help with all these questions

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

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

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?