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# March 9 Determing Equations

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### Transcript of "March 9 Determing Equations"

1. 1. So far we have looked at equations of lines and determined information about the line in order to graph it. Today we are going to do the reverse.
2. 2. A line has slope 7 and a y-intercept of -4, what is the equation of the line?
3. 3. A line has slope -4/5 and goes through point (1,3) what is the equation of the line?
4. 4. A line has slope 2/3 and goes through point (8,1) what is the equation of the line? y = 2/3x + b 1 = 2/3(8) + b 1 - 16/3 = b 3/3 - 16/3 = b -13/3 = b
5. 5. A line has slope 1/9 and goes through point (-2,5) what is the equation of the line? y = 1/9x + b 5 = 1/9(-2) + b 5 = -2/9 + b 5 + 2/9 = b 47/9 = b
6. 6. A line has slope 4 and goes through point (2,1) what is the equation of the line?
7. 7. What is the equation of this line? b=2 m = -1 y = -1x + 2
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