📈 Trend Charts – Line & Area Charts

Last Updated: 22 Sept 2025

Trend Charts show how data changes over time.
They are used to track progress, patterns, or trends.

✏ When to Use Trend Charts?

  • Data is time-based (days, months, years).
  • You want to show rise or fall over time.
  • Compare trends of two or more groups.

🎨 Color & Style Tips

  1. Use different colors for different lines.
  2. Prefer soft, contrasting colors for readability.
  3. Use markers (o, s, ^) to highlight data points.
  4. Avoid too many lines in one chart (confusing).

Do's & Don'ts

✅ Do

  • Label x-axis (time) and y-axis (value).
  • Add legend when comparing multiple lines.
  • Use gridlines for better reading.

❌ Don’t

  • Don’t skip axis or title.
  • Don’t use 3D charts (makes trends hard to read).
  • Don’t overcrowd chart with too many data points.

1. Line Chart

Let us consider the following data:

days = ["Mon","Tue","Wed","Thu","Fri","Sat","Sun"]
temperature = [30, 32, 33, 31, 29, 28, 27]

You want to create a line chart to track the temperature over the week.

Line Chart Example

2. Multi-Line Chart

Let us consider the following data:

city_a = [30, 32, 33, 31, 29, 28, 27]
city_b = [25, 27, 28, 26, 24, 23, 22]

You want to create a multi-line chart to compare the temperature of two cities over the week.

Line Chart Example

3. Area Chart

Area Chart Example

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