
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
Each year, Atlantic salmon swim upstream to return to their spawning grounds. Let $v(m/s)$ denote the swimming speed of the salmon and $Q$ denote the unit of oxygen consumption. The research shows that $V$ is directly proportional to $\log _{3} \dfrac {Q}{100}$, and when $Q=900$, $V=1$.

(1) Find the functional notation of $V$ in terms of $Q$.

(2) Calculate the unit of oxygen consumption when a salmon swims at a speed of $1.5m/s$.

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