Which of the following represents another way to write the function rule f (x) = 3x + 1? a. x = 3y + 1 b. f ( 1 ) = 4 c. f (y) = 3x + 1 d. y = 3x + 1

  D.  y = 3x+1

Step-by-step explanation:

A -- this describes the inverse function rule (x and y are interchanged).

B -- this describes one point that is described by the function rule, but does not cover the remaining infinite number of points.

C -- there is no variable y in the right side of the rule, so this would give f(1) = 3x+1, f(2) = 3x+1, and so on. The value will always be "3x+1" for any function argument. This is not the same as the given function rule.

D -- y (or any other variable except x) can stand in for f(x), so this is the same as y = f(x). It is another way to write the function rule.

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step-by-step explanation:

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