How do you know whether two quantities x and y are proportional? A. Every ratio for related pairs of x and, 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 difference x - y is the same for related pairs of x and y.

I’m sure it’s C it makes sense I had this question also

Step-by-step explanation:

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system