Question

Determine whether each pair of equations represents perpendicular lines
y – x = 3 y = –x + 7

Answer 1

yes
y=x+3
y=-x+7
lines are perpendicular when the other slope is the *negative inverse* of the other.
so for first one, slope = m= 1
for the second one, m=-1
so they're perpendicular.

Answer 2

thanks so much