PLEASE HELP !!
I don’t understand how the graphs work please help

Which expressions are equivalent to -6 + 3m

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

One positive number is 9 more than twice another. if their product is 95, find the numbers