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Decide if each function below is exponential or not.

$x$	$f(x)$
$1$	$27$
$2$	$36$
$3$	$48$
$4$	$64$

$x$	$g(x)$
$1$	$25$
$2$	$30$
$3$	$35$
$4$	$40$

$x$	$h(x)$
$1$	$392$
$2$	$360$
$3$	$320$
$4$	$284$

$x$	$k(x)$
$1$	$375$
$2$	$300$
$3$	$240$
$4$	$192$

The function $f$ .

The function $g$ .

The function $h$ .

The function $k$ .

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