Question

Is the ordered pair (4, 20) a solution to the equation y = 5x? If yes, is it the only solution?

A. Yes, and it is the only ordered pair that fits the equation. B. Yes, but it is not the only solution to the equation. C. No, because the ordered pair does not fit the equation.

Answer 1

The answer is yes,  it is an answer.  Plug in the values.  The x comes first and y is second in the order pair.  5*4=20
Now,  no,  it is not the only answer.  There are infinitely many solutions.  Any value can be x,  y is just 5 times larger.
So the answer is B,  hope this helps!