SOLUTION: The number of miles per gallon obtained with a new Prius is a function of the speed at which it is driven. Is this function increasing or decreasing on its domain? Explain.

Algebra ->  Functions -> SOLUTION: The number of miles per gallon obtained with a new Prius is a function of the speed at which it is driven. Is this function increasing or decreasing on its domain? Explain.       Log On


   

Question 992345: The number of miles per gallon obtained with a new Prius is a function of the speed at which it is driven. Is this function increasing or decreasing on its domain? Explain.

(I think the function of miles per gallon decreases on its domain; however, I am having a hard time expressing in a f(x)=.....)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The number of miles per gallon obtained with a new Prius is a function of the speed at which it is driven. Is this function increasing or decreasing on its domain? Explain.
(I think the function of miles per gallon decreases on its domain; however, I am having a hard time expressing in a f(x)=.....)
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f(x) = speed/x
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This function expresses speed and mph as indirectly related (as speed goes up
mpg does down).
cheers,
Stan H.
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