Consider the function represented by the equation x minus y is equal to 3 What is the equation written in function notation, with x as the independent variable?

Solve x − y = 3 for y, since y is the output of the function: subtract x from both sides to get −y = 3 − x, then multiply by −1 to get y = x − 3. Replacing y with f(x) gives f(x) = x − 3, which is choice D.

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