Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.

Question

x + 5y = –20

y = –7/8x – 1

32x – 28y = –36
parallel
perpendicular
neither

I think it's perpendicular - asked this question earlier but didn't get a definite response...thanks

Answer 1

yes, the two lines

y = -7/8 x - 1 and
32x - 28y = -36 are perpendicular.

Answer 2

what if the slope is the same