Question

How do you know weather two quantities x and y are proportional?

A. Every ratio y/x for related pairs of x and y is equivalent.

B. Every sum X+Y is the same for related pairs of x and y.

C. Every x term is a multiple of the previous term.

D. Every diffrence x-y is the same for related pairs of x and y.​

Answer 1

every difference x-y is the same for related pairs of x and y