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Thursday, September 29, 2011
Point Slope
Today in class we learned about point slope. The formula for point slope is: y – y¹= m (x - x¹). So If I gave you something like this: 3/2;(4,8), you would substitute the values into the equation. y - 8 = 3/2x - 12/2 ----> y = 3/2x -6 +8 ----> y = 3/2x +2. So point slope isn't as bad as it sounds. All you mainly have to do is memorize the formula and substitute the values in. Since 4 in (4,8) is x, in the equation you would substitute 4 in x¹. Same thing goes for 8. You would 8 in y¹. Also your fraction would be your slope and in the equation y = mx + b, you would substitute m as 3/2.
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