Question

Are the lines `y=2x-4` and `2x+4y=20` parallel, perpendicular, or neither?

Answer 1

Convert both into slope intercept form, `y = mx + b`

Explanation:

`2x + 4y = 20`

`4y = 20 - 2x`

`y = -1/2x +5`

The slope of the second line is the negative reciprocal of the first line, therefore the lines are perpendicular.

Hopefully this helps!