write a system of equations that is not linear and graph.

can this work equation work?

3x+2y=12
3x+2y=6

1.
3x+2y=12
y=-3/2x + 6

2.
3x+2y=6
y = =3x/2+3
when i graph it will be parallel.

All those are linear....

Here are two non linear..

y= sqrt x + 3

y= x^2 -7x