Answer:
f(18) = 3
Value of x when f(x) = 6: x = 3
Step-by-step explanation:
f(x) means “the <u>output</u> of the function <em>f </em>when the <u>input</u> is<em> x.</em>” Essentially, f(x) is the same as the output, while the "x" inside the parenthesis is the input.
Solely using the given table:
Evaluate f(18): The input here is x = 18. It is asking for the output, or the f(x). If you look at your given table, when x = 18, your f(x) = 3. So, f(18) = 3.
Determine x when f(x) = 6:
This time, it gives you the value of the f(x), which is 6. It is now asking you to find out what the input value is (or the value of x when f(x) = 6). The table indicates that the f(x) that has a value of 6 is paired with an x-value of 3. Therefore: the value of x when f(x) = 6 is 3.
