Which equation matches the graph and table

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]