\"\"

\

Observe the table.

\

Find the rule of function.

\

Rule: The twice of a number which is \"\" more than the number.

\

Remake the table.

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
In put \"\" \

Rule

\

\"\"

\ 		Out put\"\"
\"\"\"\"\"\"
\"\"\"\"\"\"
\"\"\"\"\"\"
\"\"\"\"\"\"
\

Therefore, the rule for the function is \"\".

\

\"\"

\

The rule for the function is \"\".