What is the slope of the equation for y=9-1.5x

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 monetary value earned for selling goods or services to customers is called a.) revenue b.) assets c.) money d.) accounting

Asinusoidal function whose frequency is 1/6pi