What is the value of f(x) = 9x when x = -2?

 The required value of f(x) when x = -2 is -18.

Step-by-step explanation:  We are given to find the value of f(x) when x = -2 where f(x) is defined as follows :

To find the required value, we must substitute x = -2 in equation (i).

So, putting x = -2 in equation (i), we get

Thus, the required value of f(x) when x = -2 is -18.

is there any photos or whatever?

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step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)