Question

y = -4/5 x + 3
4x - 5y = -15
[arallel, perpendicular, or neither?

Answer 1

@parallel*

Answer 2

Change the second equation to slope-intercept form and look at the slopes. The slope is the coefficient of x in slope-intercept form. :)
Parallel lines have the same slope and perpendicular lines have opposite reciprocal slopes.

Answer 3

is it parallel @KamiBug

Answer 4

Actually, it is neither b/c the slope of the first equation is negative and the second equation's slope is positive. :)