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Find the equation for the line through points (-3,1) and (4,7) use y=Mx+b
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10 votes
10 votes
Find the equation for the line through points (-3,1) and (4,7) use y=Mx+b

User Ramar
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1 Answer

14 votes
14 votes

A = (-3, 1) and B = (4,7)


m=(y2-y1)/(x2-x1)
m=(7-1)/(4-(-3))=(6)/(7)
y=(6)/(7)x+b

Now, for b, using point B


(7)=(6)/(7)(4)+b
b=7-(6)/(7)(4)\rightarrow b=(25)/(7)
y=(6)/(7)x+(25)/(7)

User William Stanley
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