Question

A cell phone company collected data of texting speed in words per minute according to time in minutes.

Explain why a scatterplot is used to represent the data, including the purpose of scatterplots.

Answer 1

Step-1: Write the reason to use the scatter plot:

Texting speed according to time is two-variable data which is represented in a scatterplot.

The scatterplot graphs the data as points to help visualize a relationship.

Here, time is independent variable.

Speed is the dependent variable with time. Also its variation is random and nonuniform.

Step-2: Write the purpose of the scatter plot:

The purpose of the scatter plot is listed as follows

• To show the inter-relationship between the two variables.
• To show how the one variable affects the other.
• To help in the prediction the behavior of the dependent variable with the independent variable.

Hence, scatter graph is the best plot to represent the texting speed.