Question

which graphing technique is best for visualizing the relationship between two numerical variables?
a. box plot
b. frequency polygon
c. scatter plot
d. histogram

Explanation:

Step1: Analyze box plot

A box plot shows distribution of data, not relationship between two variables.

Step2: Analyze frequency polygon

A frequency polygon shows frequency distribution, not relationship between two variables.

Step3: Analyze scatter plot

A scatter plot plots points for two numerical variables, showing their relationship.

Step4: Analyze histogram

A histogram shows frequency distribution of a single variable, not relationship between two variables.

Answer:

C. Scatter plot