Question

How can the equations of lines help you identify whether the lines are perpendicular, parallel, or nether?

Answer 1

We can determine whether two lines are parallel by comparing their slopes. If the slopes are the same and the y-intercepts are different, the lines are parallel. If the slopes are different, the lines are not parallel. Unlike parallel lines, perpendicular lines do intersect. Their intersection forms a right, or 90-degree, angle.