Solve each system by graphing? Need some help. :(

1.) y = -x + 1
y= 3x + 12

2.) y += 1.5x + 2
4.5x - 3y = -9

3.) y = x + 1
2x - 2y = -2

Question

Solve each system by graphing? Need some help. :(

1.) y = -x + 1
y= 3x + 12

2.) y += 1.5x + 2 
  4.5x - 3y = -9

3.) y = x + 1    
    2x - 2y = -2

anonymous · Answer

Create x and y charts and use a few easy points, wherever the lines intersect is your answer

shamil98 · Answer

If the lines coincide you have infinite solutions.
If the lines don't intersect at all then you have no solution.

anonymous · Answer

Can someone draw me an example of one of them? I'm confused...

anonymous · Answer

sure imagine you had 2 equations

y=x
y=-x

as examples if you want to graph to find the solutions this would be your answer

|dw:1387236044082:dw|

Now this is just an example but the y=-x is the solid line and the y=x is the dotted. You see where they intersect? That is the answer to the system of equations x=0. If any of the three you listed above though do not intersect, there is no solution. If they are the same line then there are infinitely many solutions