If (x1, y1) and (x2,y2) are any two points on a line the ration (y2 - y1)/(x2 - x1) is constant called the slope of the line, and it is denoted by m.
Therefore, m = (y2 - y1)/(x2 - x1) or (y1 - y2)/(x1 - x2).
The slope is a ratio of vertical to horizontal distances.
Slope = rise/run.
Directions: Find the slopes of the given lines. Also write at least ten equations of your own and find their slopes.