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5 votes
M=y2-y1/x2-x1 , solve for y1

User Levsa
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1 Answer

6 votes
cross multiply:-

Y2 - y1 = M(x2 - x1)

-y1 = M(x2-x1) - y2

y1 = y2 - M(x2 - x1) Answer
User Antoine Eskaros
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9.0k points