Geometry

Question Analysis
This question involves the basic concept of descriptive statistics, specifically identifying a measure of central tendency.
The main focus is on understanding the definition and application of the mode within a given data set.

Key Concept Explanation
The mode is the value that appears most frequently in a data set.
A data set can have one mode (unimodal), more than one mode (bimodal or multimodal), or no mode if all values occur with the same frequency.

Step-by-Step Solution
Examine each value in the data set {3, 5, 7, 7, 9}.
Count the occurrences of each value: 3 appears once, 5 appears once, 7 appears twice, and 9 appears once.
Since 7 appears more frequently than any other value, it ...