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| Mr. Algebra, How do you find the equation of a line using 2 points? | |
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| Well, because you dont know what M or B is, you first need to find them out. Let's say our 2 points were (3,5) (5,11). Then do 11-5 over 5-3 (Remember that It's always Y over X). | |
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Finding B (Y-Intercept) Cont'd
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| After you subtract, Your answer is 6 over 2. Then you can simplify that to 2. Believe it or not, you just found your M. Now, you have to find your B. | |
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Finding M and Finding Equation
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| You can find B, by distributing the slope and one of the 2 points into the equation Y=Mx+B. So you will get 11=(3)(5)+B. Solve 5x3 and then subtract 15 each side, you got B. Now insert B & M in Y=Mx=B | |
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