In the equation f(x) = 2 – 3x, find f(–4) what does the f stand for

It means to substitute the value -4 in for where ever you see x in the expression

f(- 4) = 2 - 3(- 4) = 2 - (- 12) = 2 + 12 = 14

f(x) is just a fancy math term meaning the function of x, in your case the equation would look like this;

f(-4)=2-3(-4)
=2+12
=14

hope this helped!
PS, f(x) is also y, but if an equation is written with f(x) and not y=, it's best to leave it as is.

F(x) Means a 'Function of x', so F(-4) means F of -4. Replace any x by -4 to solve:

f(x)= 2- 3x
f(-4)=2 - 3 * (-4) = 2 + 12 =14
Or f(1)=2- 3*1 = -1

f is the name of the function and f(-4) is the value of the function f at x = -4. In your case,

f(-4) = 2 - 3(-4) = 2 + 12 = 14.

f(x) the function of x, f(-4) the function of -4.

function