15. Choose the equation below that represents the line that passes through the point (7, –2) and has a slope of –3. (3 points)
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OpenStudy (anonymous):
y - y1 = m(x-x1)
OpenStudy (anonymous):
m=3, y1 = -2, x1 = 7. Put it in the equation: y - y1=m(x-x1)
OpenStudy (anonymous):
sorry m = -3
OpenStudy (anonymous):
DO you need anymore help?
OpenStudy (anonymous):
Little bit
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OpenStudy (anonymous):
The (y-v1)=m(x-x1) thing the people have been talking about is an equation of a line called point slope form where (x1,y1) is a point on the line and m is the slope of the line. Therefore with the given information, you can create an equation for the line using the point-slope form
OpenStudy (anonymous):
Try putting you point and slope into the equation and I will check
OpenStudy (anonymous):
Y- 2 = -3(x+7).
OpenStudy (anonymous):
Almost. Remember, it is (y-y1) and (x-x1) a minus sign. it would be (y+2)=-3(x-7)
OpenStudy (anonymous):
Oh thanks so much. Live saver.
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OpenStudy (anonymous):
If you want to put it into a more familiar form, you can distribute to get
y+2=-3x+21
y=-3x+19
and you're welcome