What is f(13) if f(x) = x - 11?
Understand the Problem
The question is asking to find the output of the function f(x) = x - 11 when the input is 13. This involves substituting 13 into the formula and calculating the result.
Answer
The output of the function is $f(13) = 2$.
Answer for screen readers
The final result is $f(13) = 2$.
Steps to Solve
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Substitute the input value To find $f(13)$, substitute $x$ with 13 in the function $f(x) = x - 11$.
So, we have: $$ f(13) = 13 - 11 $$
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Perform the subtraction Now, calculate the result of the subtraction.
$$ 13 - 11 = 2 $$
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State the output Thus, we have determined the output of the function when the input is 13.
The final result is $f(13) = 2$.
More Information
The function $f(x) = x - 11$ is a linear function, where for every increase of 1 in $x$, the output decreases by 1. Hence, when the input is 13, the function gives an output of 2.
Tips
- Mistaking order of operations: Always perform the subtraction correctly, as some might incorrectly add instead.
- Forgetting to substitute the variable before calculating the function result.
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