Question 640673
2x+3y=3  -->  {{{y = (-2/3)x + 1}}}, the slope is -2/3
5x+7y=0  -->  {{{y = (-5/7)x}}}, the slope is -5/7.

The lines are not parallel because the slopes are not equal.
The lines are not perpendicular because the product of the slopes is not equal to -1.

Answer: neither