Which equation has (2, −1) as a solution?

Question

A. y = 2x − 1
B. y = x + 3
C. y = x – 3
D. y = −2x + 1

Answer 1

A. y = 2x − 1

Answer 2

sorry -- 2*2-1 = 3, not -1

Try C

Answer 3

If we substitute x=2 and y=-1 in the equation y=x-3, we get:

-1 = 2 - 3

-1 = -1

Therefore, (2,-1) is a solution of the equation y=x-3.