
Math Help (+) Slope = Rate of Change  Line Graphs Game TCRD3 Tips:  The slope (average rate of change) from a point P(2,5) to a point Q(4,1) is calculated as 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 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 . Generally, the idea is that the average rate = (y_{2}y_{1})/(x_{2}x_{1}) = m .  It may take a minute to load the game at dialup speeds.  The score report automatically appears after you have made 10 choices.  The Math score is based on your choices only and does not count the butterfly hits.  The Game score is reduced by the number of butterfly hits.  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.  Refresh/Reload the webpage to start over again. 
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