HW:

Determine the solutions to the following systems by graphing. State if there is no solutions, one solution, or infinitely many solutions.

1.  3y = 9x + 15
    -3x + y = -8

2.   y = x + 5
     2y = 2x + 10

3.   x + y = 0
      2x + y = 3

4.   -2x + 2y = 4
      3 + 3y = 3x