Question

Solve the following system by graphing.

x - y = 4
x + y = 2

What is the solution of the system?

A) (3, -1)
B) (3, 1)
C) (-1, 3)

Answer 1

A

Explanation:

3 - -1 = 4

3 + -1 = 2

Answer 2

A. (3,-1)

Explanation:

x - y = 4

x + y = 2

2x = 6

x = 3

3 - y = 4

y = -1

Draw two straight lines passing through:

1) (0,-4) and (4,0)

2) (0,2) and (2,0)

You'll see that the two intersect at: (3,-1)