System of Equation by graphing

[Glnzangel]

I am supposed to be solving the system of equation by graphing,then classifying the system. The problem I am having is that the graph only goes to 10 and my answer is 15. Please check my work and tell me if I am wrong,or if I am right, how am I supposed to graph it if the graph hasn't enough space for it.

X+y=15
x-y=15
y=1x+15 (-1,15)

x-y=-3
-y=-3-x
y=1x+3 (1,3)

 

[jsterkel]

I will start by saying that I am GUESSING here, based on an internet search. Someone please correct me if I am wrong...

If I understand correctly, you are solving a system of equation by graphing, and the system has two equations:
x+y=15
x-y=-3

The result is two lines, so I think you have made a mistake by solving the equation for a single point.

Also, if I understand correctly your work, there is an error in this work:

X+y=15
x-y=15
y=1x+15


​

Graph both lines and see where they cross.