Determine whether the graphs of the equations are parallel lines, perpendicular lines, or neither.

3x - 4y = -3
8x + 6y = -3

1 answer

slope of 3x - 4y = -3 is 3/4
slope of 8x + 6y = -3 is -8/6 = -4/3

what have you learned about the slopes of perpendicular lines ?