Find f(3) given the formula f(x) = 3x.
Understand the Problem
The question is asking to find the output of the function f(3) using the formula f(x) = 3x. The user needs to substitute x with 3 to find the result.
Answer
The result is $f(3) = 9$.
Answer for screen readers
The answer is $f(3) = 9$.
Steps to Solve
- Substitute x with 3
Use the formula $f(x) = 3x$. We need to find $f(3)$ by substituting $x$ with $3$.
- Perform the multiplication
So now we calculate:
$$ f(3) = 3 \times 3 $$
- Calculate the result
Now, we calculate the above expression:
$$ f(3) = 9 $$
The answer is $f(3) = 9$.
More Information
The function $f(x) = 3x$ is a linear function where the output is three times the input. This means that for every increase of 1 in the input, the output increases by 3. Thus, as the input values increase, the output will also increase significantly.
Tips
- Forgetting to multiply correctly: Make sure to carry out the multiplication properly.
- Confusing the variables: Ensure that you are substituting the correct value into the function.
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