Compléter Slope VocabularyVersion en ligne slope of a line par Mrs. DeCarlo 1 negative Parallel Point positive run undefined rise x Slope y m zero Perpendicular The slope ratio is over . A line has slope if it goes up from left to right . A line has slope if it goes down from left to right . A line has slope if it is horizontal . A line has slope if it is vertical . To find slope given two points , subtract the - coordinates on the top of the ratio . To find slope given two points , subtract the - coordinates on the bottom of the ratio . lines have the same slope . lines have opposite reciprocal slopes . In slope - intercept form ( y = mx + b ) , stands for the slope . Use the Equation form if you are given an ordered pair and the slope .