Question

Are the graphs of x-4y=2 and 4x+y=8 perpendicular?

Answer 1

Explanation:

x-4y=2

4y=x-2

y=1/4 x-1/2

slope=1/4

4x+y=8

y=-4x+8

its slope=-4

product of slopes=1/4×(-4)=-1

so lines are perpendicular.