Question 60896
how can i solve the system by graphing.
E1:  	  x + y = 4
E2:  	–x + y = 2
:
For E1, let x=0 and y=?
0+y=4
y=4  Plot (0,4)
Now let y=0 and x=?
x+0=4
x=4  Plot (4,0)
Connect your points and you have this line:
{{{graph(300,200,-10,10,-10,10,-x+4)}}}
For E2, let x=0 and y=?
-0+y=2
y=2  Plot (0,2)
Now let y=0 and x=?
-x+0=2
-x/-1=2/-1
x=-2  Plot (-2,0)
Connect these points and you have a second line.
{{{graph(300,200,-10,10,-10,10,-x+4,x+2)}}}
The solution is their point of intersection: (1,3)
Happy Calculating!!!