Portia is a designer working on creating plans for the city of Geocove's new waterpark. The graph shows her plan for a waterslide for young children. The equation that represents this line is y= -1/3x + 4Thex -axis represents the ground, and they -axis represents one of the poles that will support the slide.
Each unit on each axis represents 1 foot. Suppose that a rider coming down this slide has a horizontal change of 6 feet. What is the value of their vertical change? Explain your reasoning.
