Look at the data points on the graph

Is this relationship a function?

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)

Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.