Graphing Programs

Chapter: Graphing Programs

Begin by locating a graphing utility that you can use for this lab. On a macintosh, you will find Grapher.app in the Utilities subfolder of the Applications folder. On a Windows machine, you can use google to find something you like. It's conceivable that you might like using the graphing capabilities in a spreadsheet program like Excel. Whatever you use, make sure your program can create graphs in a format that you can send to the lab instructor.

To make sure you've got the idea behind how to use your graphing program, try your hand at:


Exercise 1

Draw a graph of y = 2x2 - 3x - 4 with the x axis going from -2 to +4, the y axis from -8 to 10, and with the major and minor tick marks and labels as shown in the picture. Color the curve red. Be sure you also have a reasonable title.

Now let's see if we can plot a set of points. Here is a table of the population of Dublin from 1841 to 2002:

1841 372773
1851 405147
1861 410252
1871 405262
1881 418910
1891 419216
1901 448206
1911 477196
1926 505654
1936 586925
1946 636193
1951 693022
1956 705781
1961 718332
1966 795047
1971 852219
1979 983683
1981 1003164
1986 1021449
1991 1025304
1996 1058264
2002 1122821

Source: Central Statistics Office, Skehard Road, Cork, Ireland.

You should be able to graph these points, to look something like this

This should be a quick and easy exercise.


Exercise 2

I do not like the scientific notation for the labels on the vertical axis. Do something to make it nicer. Also do something to make the axes appear and look good.


rhyspj@gwu.edu