Question

Are the lines y = –x + 8 and 3x + 3y = 9 perpendicular? Explain.

Answer 1

No

Explanation:

Rearrange the equations to match the linear y=mx+b

1. 3x + 3y = 9

y = -x +3

2. y = -x + 8

y = -x + 8

Since the two equations have the same slope, they are parallel, not perpendicular.