Question

Which ordered pairs are solutions to the equation?

y = x – 4

A.
(10, 6) and (1, 5)

B.
(10, 6) and (5, 1)

C.
(10, 4) and (5, 1)

D.
(10, 5) and (5, 1)

Answer 1

Plug the values (x,y) into the equation and check:

`(10,6) \\ 6=10-4 \\ 6=6 \\ true \\ \\ (1,5) \\ 5=1-4 \\ 5=-3 \\ not \ true \\ \\ (5,1) \\ 1=5-4 \\ 1=1 \\ true \\ \\ (10,4) \\ 4=10-4 \\ 4=6 \\ not \ true \\ \\ (10,5) \\ 5=10-4 \\ 5=6 \\ not \ true`

The ordered pairs that are solutions to the equation are (10,6) and (5,1).
The answer is B.