How do you evaluate the function $f(x)=3x-7$ for x=4?

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Answer 1 · 2015-10-30T08:56:00

$5$

Substitute $4$ into the function everywhere that there is an $x$ .

You would get

$3(4)-7$
$=12-7$
$=5$
$f(4)=5$

$f(4)$ is the same thing as evaluating the function for $x=4$ .

How do you evaluate the function f(x)=3x-7 f(x)=3x-7 for x=4?