SOLUTION: Find f(3), given that f is a linear function with f(1)=2 and f(4)=-7

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Question 1002125: Find f(3), given that f is a linear function with f(1)=2 and f(4)=-7
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
m = (-7 -2) / (4 - 1) = -3
2 = -3 + b
b = 5
f(3) = -3*3 + 5 = -4
note that the linear function is f(x) = -3x + 5