
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
A car currently has 50L of gasoline in its tank. If no more gasoline is added, the amount of gasoline $y$ (L) in the tank decreases as the driving distance $x$ (km) increases, with an average fuel consumption of 0.1L/km.  
(1) Write the function that represents the relationship between $y$ and $x$.  
(2) Indicate the range of values for the independent variable $x$.  
(3) How much gasoline remains in the tank when the car has traveled 200km?

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