which type of lines match these equations

Question

x + y = 12
x-y=2

Answer 1

Put both equations into slope-intercept form: y = mx + b

 

x + y = 12

y = -x + 12

 

x - y = 2

-y = -x + 2

y = x - 2

 

The slopes are negative reciprocals of each other and the y-intercepts are different.

The two lines are perpendicular.