
Math Help  Slope = Rate of Change  Line Graph Game LCRD2 Tips:  Press the 't' key to see a graph that demonstrates the following example.  The slope (average rate of change) from a point P(2,3) to a point Q(1,4) is calculated as slope = (rise)divided by(run) = (change in y)/(change in x) = (4(3))/(1(2)) = (7)/(3).  Press the 'y' key to restart the game.  The rate of change in a relation such as y=mx and its ordered pairs (x,y) can be measured by the ratio = (change in y)/(change in x) = m = slope. Generally, the idea is that the average rate = (y_{2}y_{1})/(x_{2}x_{1}) = m = slope.  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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