What is the slope of the line shown below

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

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Find dy/dx using implicit differentiation ln(20+e^xy)=y