How to plot line graphs, Mathematics

Q. How to plot Line Graphs?

Ans.

Line graphs can be useful in analyzing data. They are particularly helpful when you are interpolating or extrapolating information from your data set.

Example: A start-up Internet company tracks the number of "hits" their website receives at different times in the day. Make a line graph of the information. Estimate the number of hits the website receives at 4:30pm, 9:30pm and 12:00am.

 

1890_How to plot Line Graphs.png

Solution: To draw a line graph of the above information, first decide on the axes. Let the x-axis be the time of day and the y-axis be the number of hits. Then draw dots at the proper places on your graph.

1882_How to plot Line Graphs1.gif

Estimating the number of hits the website received at 4:30pm and 8:30pm can be done using the line graph. Draw vertical lines at 4:30pm and 8:30pm and the points of intersection with the line graph represent the estimated number of hits at these times. You can estimate the number of hits at 12:00am by extending the graph another two hours. Use the previous few hours as a way to predict the future hits. All three of these estimates are shown with orange lines in the graph below.

1305_How to plot Line Graphs2.png

The estimated numbers of hits are 300 at 4:30pm, 260 at 9:30pm and about 110 at 12:00am.

Posted Date: 5/3/2013 3:03:14 AM | Location : United States







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