Answer:
![f (3) = 9](https://img.qammunity.org/2020/formulas/mathematics/high-school/8x37e8gqrvl2pjp833hoenxfpsyxxtod0v.png)
Explanation:
For every function f(x) the variable x is known as the function argument. This variable represents the input value of the function.
Then f(3) represents the value of the function f when the input value x is equal to 3.
Note that the input values appear in the left column of the table shown.
The output values appear in the right column of the table.
Then to find f(3), locate the number 3 in the left column and then read the corresponding f(3) value in the right column.
You may notice that:
![f (3) = 9](https://img.qammunity.org/2020/formulas/mathematics/high-school/8x37e8gqrvl2pjp833hoenxfpsyxxtod0v.png)