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(6,-5) and (9,r) lie on a line with slope -4. find missing coordinate r
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(6,-5) and (9,r) lie on a line with slope -4. find missing coordinate r

User Mborsuk
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1 Answer

4 votes
(6,-5)(9,r)

(r - (-5) / (9 - 6) = -4
(r + 5) / 3 = -4
r + 5 = -4 * 3
r + 5 = -12
r = -12 - 5
r = - 17 <===
User NPadrutt
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