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OpenStudy (anonymous):
find the value of r so that the line through (8,r) and (4,5) has a slope of -4
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OpenStudy (anonymous):
use the formula for slope=((y2 -y1 )/ (x2 -x1)), plug everything in and solve for one unknown.
OpenStudy (anonymous):
I couldn't of explained it better! God job @Boblovesmath
OpenStudy (anonymous):
*good
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