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12-07-2017
Mathematics

contestada

Find the value of r so the line that passes through each pair of points has the given slope.
(-4,3), (r,5), m = 1/4

Respuesta :

12-07-2017

m = (y2 - y1) / (x2 - x1)
1/4 = (5-3) / (r +4)
1/4 = 2/ (r + 4)
Cross multiply
2*4 = r + 4
8 = r + 4
Subtract 4 from both sides
4 = r

CHECK
(-4,3)(4,5)
m = (5-3)/(4--4) = 2/8 = 1/4

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