Graph and solve y= 5x-3 and y= -3x-3

Y = 5x - 3  | 3y = 15x - 9    | Solution Below. (attatched is a graph I found, of this)
y = -3x - 3 | 5y = -15x - 15 |  y = -3
++  x = 0
8y = -24        | Sooo according to my math the graph should be a horizontle
 y = -3           | line going across the Y-axis on [ 0, -3 ] However the graph I got
-9 = 15x - 9   | off of google says the same thing so If you wanted a graph as an
15x = 0          | answer it would still be the same. Just google y= 5x-3 and           x = 0             | y= -3x-3 This will show an accurate graph like a definition does.

what bull are you on it don't even work on my calculator