
Slope from two Ordered Pairs on a Graph Game LCRD2b Tips:  The slope from a point P(2,5) to a point Q(4,1) is the (rise)/(run) = ((1)(5))/(4(2)) = (6)/(6) = 1. If the run = 0, then the vertical slope is said to be undefined.  Positive slopes rise to the right. Negative slopes rise to the left.  The slope from a point P(x_{1},y_{1}) to a point Q(x_{2},y_{2}) = (change in y)/(change in x) = (y_{2}y_{1})/(x_{2}x_{1}) .  It may take a minute to load the game at dialup speeds.  The game can be played using the mouse by itself or using the keyboard by itself.  If the game doesn't respond to keyboard input, click inside the game area to reset the game's focus.  Adjust the game's speed by pressing the + or  key repeatedly. 
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