Math

I am doing a warm up and got stuck on a function question
x : 2 3 4
f(x): 2 1 0

Can someone help me figure out the function rule?

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  1. y decreases as x increases, so start with

    y = -x
    Since y(2) is 2, and not -2, add 4:
    y = 4-x

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  2. I get it. So it's like 4-2= 2, 4-3= 3, and 4-4= 0 . I thought it was saying that y is y(x), that just stands for the name of the function. The function rule is something different. Thanks so much for your help, Steve.

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