How do you find the value of f(a), if $f (x) = 3 x - 4$ $f(x)=3x-4$ ?

Question

7976 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-06-04T18:05:03

See a solution process below:

To find $f (a)$ $f(a)$ substitute $a$ $color(red)(a)$ for each occurrence of $x$ $color(red)(x)$ in $f (x)$ $f(x)$ :

$f (x) = 3 x - 4$ $f(color(red)(x)) = 3color(red)(x) - 4$ becomes:

$f (a) = 3 a - 4$ $f(color(red)(a)) = 3color(red)(a) - 4$

How do you find the value of f(a), if f(x)=3x−4f(x)=3x-4?