Slope is the ratio of the vertical distance between two points on a Rise = 6 line to the horizontal distance betweenRun = 6 the same two points. Slope = rise run The slope of this line is 6, 6 which reduces to 1.
Positive No SlopeUndefined Negative
The slope of a line ispositive when, movingfrom left to right acrossthe graph, the lineincreases.This is positive slopebecause both the riseand the run are positivenumbers.
A line has a slope ofzero, or no slope,when it is perfectlyhorizontal.This is because therise of the line is 0.
The slope of a line isundefined when it isperfectly vertical.It is undefined becausethe run of the line is0, and any numberdivided by 0 isundefined.
The slope of a line isnegative when, whenmoving from left toright on the graph, theline decreases.This is negativebecause either the riseor the run is negative.