Determine Value of r so that the line through the given points has the given slope

Question

(r,2), (4,-6); slope = -8/3

Answer 1

Using formula for the slope between two points:

[2-(-6)]/(r-4) = -8/3

8/(r-4) = -8/3

-8(r-4)=8(3)

r-4=-3

r=1

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