Page 121 - WCS - Electrical

WORKSHOP CALCULATION & SCIENCE - CITS

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Line Diagram
A line diagram, also known as a line graph or line chart, is a type of chart that displays information as a series
of data points connected by straight lines. Line diagrams are commonly used to show trends, patterns, or
relationships between continuous variables over time or other ordered categories. Here are some key points
about line diagrams:

Concept
Line diagrams use connected data points to represent the progression or change in values over a continuous scale,
such as time. Each data point is plotted on the chart, and lines are drawn to connect these points, emphasizing
the trend or pattern in the data.
Best Uses
Visualizing trends and changes over time. Highlighting relationships between variables. Identifying peaks, troughs,
or patterns in the data.
Components of a Line Diagram
Data Points: Represent specific values at different points in time or categories.
Lines: Connect the data points to show the trend or progression.

Axes: The horizontal axis typically represents time or categories, while the vertical axis represents the scale of
the values.
Labels: Each data point and axis should be labelled for clarity.

Creating a Line Diagram
Organize your data with time or ordered categories on the horizontal axis and corresponding values on the
vertical axis. Plot the data points on the chart and connect them with lines to show the trend. Label the axes, data
points, and provide a title to the chart for context.
Interpreting a Line Diagram
Look for trends, patterns, or changes in the data over time. Identify any significant increases, decreases, or
fluctuations in the values. Use the chart to make predictions or analyze relationships between variables.
Limitations
Line diagrams can become cluttered with too many data points, making it challenging to interpret the information.
They are not ideal for comparing discrete categories or representing data with a large number of categories.
Line diagrams are valuable tools for visualizing data trends and patterns, making them popular in fields such as
economics, science, and social sciences. Prepare a line chart for the following sales data of the Year 2023.
Sales Data of 2023
Solution
• Prepare a line chart with the following data
• Suppose a company tracks its monthly website traffic over the past year. The
• monthly website visitor’s data is as follows:
• January: 1000 visitors
• February: 1200 visitors

• March: 1500 visitors
• April: 1300 visitors

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CITS : WCS - Electrical - Exercise 9