Line Graph
A line graph is used to show the relationship between two (2) variables,
the independent variable and the dependent variable. The variables being
compared are placed along the two (2) axes of the graph. The independent
variable is always placed along the horizontal axis, called the x-axis.
The dependent variable is always placed along the vertical axis, or
y-axis.
Example:
At George's and Betty’s request, the Sprintsville Beach Quality
Resort analyzed how many satisfied customers had stayed at their resort
over the past four years as compared to two of its competitors. The
Quality Resort sent George and Betty a line graph to display this data.
Steps:
- Use a trend line to display some variable over a period of time.
- If using multiple lines, use some method (dashes, dots, etc.) to
distinguish between them. The solid black line should receive the
greatest emphasis, representing your own department or actual data.
- If the line graph tracks over a period of time, show the most recent
data when presenting results.
- When possible, include a forecast of the likely future trend for
your data and for your comparison data.
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