Parallel and perpendicular lines worksheet algebra 1

Answer: Lines with the same slope are parallel and if the slope of one line is the negative reciprocal of the second line, then they are perpendicular.

Use the slope-intercept form to find the slope. The slope-intercept form is y=mx+b y = m x + b , where m m is the slope and b b is the y-intercept. Using the slope-intercept form, the slope is 1 1 . All lines that are parallel to y=x+4 y = x + 4 have the same slope of 1 .

As mentioned above, the slopes of perpendicular lines are negative reciprocals of each other.