Create Charts and Tables for Data Analysis

Data analysis means studying numbers and information to find patterns, trends, and answers to questions. Charts and tables make data much easier to understand by turning numbers into visual displays. Choosing the right chart type is an important skill.

Types of Charts

• Bar chart — uses vertical or horizontal bars to compare quantities across different categories.
• Line chart — uses a line connecting data points to show change over time.
• Pie chart — uses slices of a circle to show how categories relate to a whole.
• Table — organizes data into rows and columns for easy comparison and reference.

Parts of a Bar Chart

• Title — tells the reader what the chart is about.
• X-axis (horizontal) — usually shows categories (e.g. names, months, subjects).
• Y-axis (vertical) — usually shows the values or amounts being measured.
• Bars — the colored rectangles that show each value (the data points).
• Labels — written on the axes to identify what is being measured; a legend (key) explains what each color stands for.

Choosing the Right Chart

• Use a bar chart when comparing quantities across categories.
• Use a line chart when showing change over time.
• Use a pie chart when showing parts of a whole (percentages).
• Use a table when showing exact values or comparing multiple attributes.