Line 1: y= - 4/3x - 8
Line 2: 3y = - 4x + 4
Line 3: 6x + 8y = - 4
First we need to write each equation in the slope-intercept form, as follows:
Line 1: y= - 4/3x - 8
Line 2: y = -4/3x + 4/3
Line 3: y = -3/4x - 1/2
Line 1 and 2 are parallel because both have the same slope.
Line 1 and 3 and 2 and 3 are neither parallel nor perpendicular.