Your question is Testing Statistical Significance. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How do you determine if a trend in the data is statistically significant or just noise?
Explain a practical workflow for a time series, including how you would define the null hypothesis, model the trend, account for autocorrelation and seasonality, calculate uncertainty, and avoid false discoveries from repeated analysis. Describe what additional data or diagnostics you would request before making a business decision.