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Math·Advanced Math·Nonlinear functions

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$x$	$f(x)$
1	4,000
2	2,400
3	1,440
4	864

For the function $f$, the table shows four values of $x$ and their corresponding values of $f(x)$. $x$: 1, 2, 3, 4 $f(x)$: 4,000, 2,400, 1,440, 864 Which of the following could describe this function?

A

Decreasing exponential

B

Increasing exponential

C

Decreasing linear

D

Increasing linear