Visualization is useless if you don’t know what to look for.

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🔍 Key Patterns:

📈 Trend

• Upward or downward movement over time

🔵 Clusters

• Groups of similar data points

🔴 Outliers

• Values far away from others

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🧠 Example:

In a scatter plot:

• Tight grouping → strong pattern
• Random spread → weak pattern

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❓ Check Your Understanding:

1. What is the difference between a trend and a cluster?
2. Can an outlier sometimes be useful? Give an example
3. What does a flat trend indicate?

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🧪 Practice Dataset:

👉 Tasks:

• Identify the outlier
• Decide whether to remove it
• Explain your reasoning