Questions and Answers
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?
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What is plotted on the horizontal axis in a line graph?
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What is the purpose of connecting the points in a line graph?
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What is the characteristic of a line graph?
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What is a common feature of line graphs that display data over time?
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What is the purpose of using different colors in a double-line graph?
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What type of graph is suitable for showing how different categories contribute to a whole?
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What is the main difference between a line graph and a double-line graph?
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What is an advantage of using a pie graph?
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What is typically represented on the x-axis of a line graph?
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What is the purpose of using a key or legend in a graph?
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Which type of graph is not suitable for showing a trend over time?
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Study Notes
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.
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Description
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.
