Line Graphs

Line graphs are used to display the change in a set of data over a period of time. A multiple-line graph shows change in more than one category of data over time. You can use a line graph to look for trends and make predictions.

Exercises

Graph the data in each table.

1. Market Share (percent)

   Year	2004	2005	2006	2007
   Rap/Hip Hop	12.1	13.3	11.4	10.8
   Pop	10.0	8.1	7.1	10.7

   SOURCE: Recording Industry of America

2. Percent of Schools With Internet Access

   Year	1997	1999	2001	2003
   Elementary	75	94	99	100
   Secondary	89	98	100	100

   SOURCE: National Center for Education Statistics

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