PLEASE HELP MY HALF OF MY GRADE IS BASED OFF OF THIS AND I STILL HAVE SO MANY QUESTIONS LEFT AND I'M STUCK ON THE FIRST ONE I need to find the Constant of Proportionality between X and Y for each of the pictures

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

Is there an x intercept in the equation 60*1.15^x

In a column proof the right column states your reasons