To complete the table for the function \( f(x) = x - 1 \), we can calculate \( f(x) \) for each given value of \( x \):
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When \( x = 1 \): \[ f(1) = 1 - 1 = 0 \]
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When \( x = 3 \): \[ f(3) = 3 - 1 = 2 \]
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When \( x = 5 \): \[ f(5) = 5 - 1 = 4 \]
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When \( x = 7 \): \[ f(7) = 7 - 1 = 6 \]
Now we can fill in the table:
\[ \begin{array}{|c|c|} \hline x & f(x) \ \hline 1 & 0 \ 3 & 2 \ 5 & 4 \ 7 & 6 \ \hline \end{array} \]
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