ng-and-then-verify-algebraically-y-x-4-and-2x-y-1-what-is-the-intersection-point

Question

Solve the system by graphing (and then verify algebraically): y = x - 4 and 2x + y = 1. What is the intersection point?

Accepted Answer

(5/3, -7/3)

Answer

(5, -7) which is a scaled-up integer pair that would lie on a different line but not on these two lines concurrently.

Answer

(1, -3) obtained by mistakenly treating y = x - 4 as y = x + 4 and solving incorrectly.

Answer

(2, -2) which might seem plausible if the graphing was approximated but is not the exact algebraic intersection.