Question

If f(x) = x - 4, what does f(3) represent?

The value of (x - 4) when x = 3
The value of x when (x - 4) = 3
The value of 3f(x) when x = 3
The value of f(x) when (x - 4) = 3

Answer 1

plug 3 in for x.

Answer 2

I am going to give you a couple of examples.
\(\large\color{black}{ f(x) = x - 4 }\)
\(\large\color{blue}{ f(2) = (2) - 4 =-2 }\)
\(\large\color{red}{ f(-3) = (-3) - 4 =-7 }\)

Answer 3

f(3)=3-4
f(3)=-1 ?

Answer 4

Yes

Answer 5

So its A?

Answer 6

f(x)=x+3
for example
F(x) means when you input the value of x into the equation, where ever you see that variable x is where that number (in parenthesis goes).

Answer 7

this is the value of f(x) when x=3. (Saying, in other words, the "f(3)", the f of 3")

Answer 8

Yes it is A