3 years ago

Find the value of r so that the line through (2,8) and (r,-4) has a slope of -3

Mathematics

1 answer:

crimeas [40]3 years ago

4 0

Answer:

Step-by-step explanation:

The slope (m) is given by ...

m = (y2 -y1)/(x2 -x1)

Filling in the given values, we have an equation we can solve for r.

-3 = (-4 -8)/(r -2)

r -2 = -12/-3 . . . . . multiply by (r-2)/-3

r = 6 . . . . . . . . . . . add 2

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