Do think it is A, B, C, D?

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

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

It says factor each expression 49x-28?