Bars, it plots points and connects them with a line .It has the same parts as a bar graph – two labeled axes –and can be read the same way .To read a line graph, it’s important to focus on the points of intersection rather than the line
segments between the points, This type of graph is most
commonly used to show how something changes over time.
Here is a graph that charts how far a bird flies during the first Five days of its spring migration (See Graph 2).
The unit of measurement for the x-axis is days. The unit of measurement for the y-axis is kilometers. Thus we can see that ,on the first day, the pipit flew 20 kilometers. The line segment goes up between Day 1 and Day 2,which means that the bird flew farther on Day 2.If the line segment angled dawn, as between Day 4 and Day 5,it would mean that the bird flew fewer
kilometers than the day before. This line graph is a quick, visual way to tell the reader about the bird’s migration.
Pie Graphs
A typical pie graph looks like a circular pie. The circle is divided into sections, and each section represents a fraction of the data. The graph is commonly used to show percentages; the whole pie represents l00 percent, so each piece is a fraction of the whole.
A pie graph might include a legend,or it might use icons or labels within each slice. This pie graph shows on month’s expense, (See Graph 3 ).
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