SOLUTION: For the function f(x), f(2.3)= -7.2 and f(8.4)= 9.1. What is the equation for the function f(x)?

Algebra ->  Test -> SOLUTION: For the function f(x), f(2.3)= -7.2 and f(8.4)= 9.1. What is the equation for the function f(x)?      Log On


   

Question 612404: For the function f(x), f(2.3)= -7.2 and f(8.4)= 9.1. What is the equation for the function f(x)?
Answer by stanbon(75887) About Me  (Show Source):
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For the function f(x), f(2.3)= -7.2 and f(8.4)= 9.1. What is the equation for the function f(x)?
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slope = (9.1--7.2)/(8.4-2.3) = 16.3/6.1 = 163/61
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Form: y = mx + b
Solve for "b":
9.1 = (163/61)8.4 + b
b = 9.1 - 22.45 = -13.35
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Equation:
y = (163/61)x - 13.35
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Cheers,
Stan H.
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