
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
You measure the temperature (y, in degrees Celsius) at different altitudes (x, in kilometers) and have the following data points: $(0, 15^\circ C), (1, 10^\circ C), (4, 5^\circ C)$. A lower but unusual reading was taken at 2 km, recording $8^\circ C$. Calculate the slope of the line that best fits these data points considering that they may not be evenly spaced or linear.
A) $-2.343$ 
B) $2.343$
C) $0.343$
D) $-1.235$

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