Question

How can I determine perpendicular lines

Answer 1

Explanation:

Lines are considered to be perpendicular if the angle between at the point they intersect is 90°, or a right angle.

If you have the equations of two lines, you can determine if they are perpendicular by looking at their slope. For the slope-intercept form of a line,

`y = mx + b`

`m` is the slope of the line.

Two lines are considered perpendicular, if the slope of one line is
`m`, and the slope of the other line is
`(1)/(-m)`.

For example, if a line had a slope of 4, say
`y = 4x + 2`, then a line that would be perpendicular to this line would have a slope of
`(-1)/(4)`, say
`y = (-1)/(4) + 7`.