# Line Graphs

A line graph displays data using line segments. Line graphs are mostly used to display data that changes over a period of time.

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Example:
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The table shows Russel's height at $3$ -year interval. Make a line graph to display the data.

Age | $3$ | $6$ | $9$ | $12$ | $15$ | $18$ | $21$ | $24$ |

Height (feet) | $1.9$ | $2.4$ | $2.7$ | $3$ | $4.6$ | $5.5$ | $6.1$ | $6.2$ |

To draw a line graph, first draw a horizontal and a vertical axis. Age should be plotted on the horizontal axis because it is independent. Height should be plotted on the vertical axis.

Then look for the given data and plot a point for each pair of values. Draw a line connecting each pair of consecutive points. Then title the graph and label the horizontal and vertical axis.