
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 a spring is $6cm$ long when no weight is attached to it, and within a certain elastic limit, the spring extends $0.3cm$ for each $1kg$ weight attached. The function relationship of the total length $y\left(cm\right)$ of the spring changing with the mass $x\left(kg\right)$ of the attached object is ______.

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