10 Questions
What is the primary purpose of creating a graph?
To show the relationship between two variables
What are the two variables that might be plotted on a graph?
Month and inches of rainfall
What type of graph is commonly used to show how data changes over time?
Line graph
On a line graph, what is typically plotted on the horizontal axis?
Day of the month
What is the process of creating a line graph?
Plotting points on a coordinate plane and connecting them with line segments
What does a line graph show?
Trends and patterns over time or a range of values
What is the purpose of a double-line graph?
To compare two different data sets
What is the main difference between a line graph and a pie graph?
The shape of the graph
What does a pie graph typically represent?
How different categories contribute to a whole
Why would someone use a pie graph to display their expenses?
To visualize how their expenses are distributed across different categories
Study Notes
What are Graphs?
- A graph is a visual representation of a set of data points, often showing the relationship between two variables.
- There are various types of graphs, including line and pie graphs.
Drawing a Graph from Data
- Data is a collection of information involving two variables, such as rainfall measured in inches and the month it fell.
- To construct a graph, a vertical and horizontal axis are used, and different types of graphs can be created, including line graphs, bar graphs, and scatter plots.
Line Graphs
- A line graph displays data as increasing and decreasing segments connected to form a continuous line.
- Variables are examined, such as the number of babies born at a hospital on each day in May.
- The day of the month is plotted along the horizontal axis, and the number of babies is plotted along the vertical axis.
- Points are plotted and connected using line segments, showing increases and decreases in the data.
- Double-line graphs can be used to compare two sets of data, such as the number of boys and girls born at the hospital.
Pie Graphs
- A pie graph is a circular representation of data, divided into categories and shown as a percentage of the whole circle.
- Categories are usually in different colors and are depicted as "pie slices".
- Pie graphs can be used to show how someone spends their money each month, broken down into categories such as mortgage, utilities, food, and entertainment.
- Each category represents a percentage of the total expenses, and the pie slices are drawn accordingly.
Learn about visual representations of data, including types of graphs and how to construct them. Understand how graphs show relationships between variables and how to draw a graph from data.
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