
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
The relationship between the sales quantity of a certain type of apples and the selling price is shown in the table below. If the purchase of $x$ kg costs $y$ yuan, then the relationship between $y$ and $x$ is ______. 

| Quantity of Apples ($/kg$) | $1$ | $2$ | $3$ | $4$ | $\ldots$ |
|---------------------------|----|----|----|----|---------|
| Selling Price ($/$)       | $8$| $16$| $24$| $32$| $\ldots$ |

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