Answer:
Here is your answer for <em>plato / edmentum</em>... see image
Explanation:
If the equations have the same slope for example y=4x+2 AND y=4x+3 have the smae slope of 4/1, making them parallel but if the don't have the same slope for example y=2x+3 and y=4x+4 then they are not parallel
See the picture attached above