III. Use any formula of your choice to find f(40). Explain why you chose that method and what your answer means. Show your calculations. I need help with this as soon as possible please!! I have NO clue how to do it. I've tried, and my teacher has explained it to me, but I still don't understand!

Question

III.	Use any formula of your choice to find f(40). Explain why you chose that method and what your answer means. Show your calculations. I need help with this as soon as possible please!! I have NO clue how to do it. I've tried, and my teacher has explained it to me, but I still don't understand!

abb0t · Answer

I don't understand either.

abb0t · Answer

Wassup.

mathmale · Answer

M. J., what were the instructions for the original problem you presented?  Sounds like something is missing.  Didn't the original problem define the function f(x) for you?

At any rate, not knowing what f(x) represents, I'm limited to saying that f(40) represents the value of the function f when x happens to have the value 40.

anonymous · Answer

That was exactly how the problem was worded, there wasn't any other explanations for it @mathmale

mathmale · Answer

Aha.  We're supposed to invent our own function, f(x).
Supposing we chose the linear function f(x) = -1x  + 20, we'd evaluate f(40) by letting x = 40 and simplifying the result.  Try it.  "f(40) is the function (or y-) value assigned by the function when x = 40."

anonymous · Answer

Okay, I got it now! Thank you!! @mathmale