SOLUTION: Find the value of m and n in f(x)=mx + n if f(2)=7 and f(-1)=-2

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Question 1091620: Find the value of m and n in f(x)=mx + n if f(2)=7 and f(-1)=-2
Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
system%282m%2Bn=7%2C-m%2Bn=-2%29

Easy to ELIMINATE n.
2m%2Bn-%28-m%2Bn%29=7-%28-2%29
2m%2Bn%2Bm-n=9
3m=9
m=3


n=m-2
n=3-2
n=1


RESULT: system%28m=3%2Cn=1%29