Data Visualization: Scatter Plot

Scatter Plot

Scatter plot is a graph where in two variables are plotted against X and Y Axes. The plotted data might reveal the correlation between the two variables plotted.


Visual Look:

Scatter plots are similar to line graphs. The only difference is a line graph has a continuous line while a scatter plot has a series of dots. 

Primary goal:

This type of plot is used to identify relationship between the two variables. The relationship could indicate the following:

  • Strength
  • Shape – Linear, Curved, etc.,
  • Direction – Positive or Negative
  • Presence of Outliers

When do we use it?

  • When we need to understand the cause-and-effect relationship
  • When we need to understand the relationship between two variables.

Example scenarios:

  • Age and weight
  • Variation in sales based on certain conditions (E.g., Temperature in the City, Event,etc.,)
  • Increase in adoption of telephones over the years


Example of Scatter Plot done in Excel:

Source Data:




In the next post we will see how we can do the same with “R”.


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