
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given that each box of ballpoint pens contains 12 pens and is sold for 18 yuan, determine the relationship between the price of the ballpoint pens (yuan) and the number of ballpoint pens (x).

Present the answer in LaTex format: \boxed{Your answer}
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