Graphs and Data Analysis

What is the primary purpose of creating a graph?

What type of graph would be used to show the proportion of each slice of data?

What are the two variables in a graph that measures the amount of rainfall per month?

What type of graph would be used to show the number of babies born at a hospital on each day in May?

What is plotted on the horizontal axis in a line graph?

What is the purpose of connecting the points in a line graph?

What is the characteristic of a line graph?

What is a common feature of line graphs that display data over time?

What is the purpose of using different colors in a double-line graph?

What type of graph is suitable for showing how different categories contribute to a whole?

What is the main difference between a line graph and a double-line graph?

What is an advantage of using a pie graph?

What is typically represented on the x-axis of a line graph?

What is the purpose of using a key or legend in a graph?

Which type of graph is not suitable for showing a trend over time?

What are Graphs?

A graph is a visual representation of a set of data points that shows the relationship between two variables.
There are many types of graphs, including line graphs and pie graphs, which are two of the most common ways to draw a graph.

How to Draw a Graph from Data

Data is a collection of information that involves two variables.
One variable can be time, measured in months, days, minutes, or years.
A graph can be constructed using a vertical axis and a horizontal axis, and can be represented in different ways, such as line graphs, bar graphs, and scatter plots.

Line Graph

A line graph displays data as increasing and decreasing segments connected to form a continuous but usually staggered line.
The graph has two variables: one on the horizontal axis and one on the vertical axis.
Each point is plotted on the graph, and then connected using line segments.
Line graphs can be single-line or double-line, with double-line graphs showing more detailed information.

Line Graph Examples

A line graph can show immigration from Greece, with years on the horizontal axis and number of people immigrating on the vertical axis.
A double-line graph can show the percentage of US households with different income levels over 40 years.

Pie Graph

A pie graph is a circular representation of data divided into categories and shown as a percentage of the whole circle.
Each category is usually represented by a different color and a "pie slice" according to the percentage.
Pie graphs are commonly used to show how a whole is divided into different parts.

Pie Graph Examples

A teacher can use a pie graph to show the breakdown of grades in a class, with each grade represented by a percentage of the whole.
A pie graph can also be used to show how someone spends their money each month, with each category of expense represented by a percentage of the total expenses.

Learn about the basics of graphs, how to draw them from data, and understand the relationship between variables. Covers different types of graphs, including line graphs and pie graphs.