What is this (College Math)

Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression

How many solutions does the nonlinear system of equations graphed below have?

Hi, can anyone show me how to do this problem? 100 points for this. in advance