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 Related Terms
 Slope:  The "steepness" of a line.
Parallel Lines: Two lines are parallel if they lie in the same plane and they do not intersect.
Perpendicular Lines: Two lines are perpendicular if they intersect at a right angle.
Rise: The vertical distance between two points on a line.
Run: The horizontal distance between two points on a line.
Slope-intercept Form: One way to write the equation of the line. Uses the form y = mx + b, where m is the slope and b is the y-intercept.
Ratio: A comparison of two quantities that have the same unit of measure.