SOLUTION: Find the value of r so the line that passes through each pair of points has the given slope. {{{ (r,5), ( -2, r) ,m = -2/9 is a fraction )))

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Question 425689: Find the value of r so the line that passes through each pair of points has the given slope.
(r,5), ( -2, r) ,m = -2/9 is a fraction )))
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find the value of r so the line that passes through each pair of points has the given slope.
(r,5), ( -2, r) ,m = -2/9 is a fraction
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slope = (r-5)/(-2-r) = -2/9
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Cross-multiply:
9(r-5) = 2(2+r)
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9r-45 = 4+2r
7r = 49
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r = 7
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Cheers,
Stan H.
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