Question 206627: If f is a linear function and f(0)=10 and f(10)=14, find f(5) and f(-5).
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! f(0) = x/2.5 +10 = 0+10 = 10,,,,ok
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f(10) = x/2.5 +10 = 4 +10 =14,,,,ok
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one solution is f(x) = x/2.5 +10
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f(5) = 5/2.5 +10 = 2 +10 = 12
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f(-5) = (-5)/2.5 +10= -2 +10 = 8
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to check, a rough sketch shows this to be a positive linear line, slope
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(1/2.5) and y intercept at +10
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