1. The range, the difference between the greatest and least values, will help you determine the intervals.(range divided by the number of intervals.)

2. Graph… Subtract the lowest number from the greatest number Next divide the range by the number of intervals. Then you round the number upwards, if needed Now fill in the graph with the data given to you

3. Practice Problems Try and find the range and how many intervals. 1)Favorite sports: football-23, soccer-10, basketball-18, track-5. 2)Favorite ice creams: chocolate-96, vanilla-80, Cookie-dough-9 3)Favorite colors: red-8, green-26, pink-25, blue-30 4)Favorite school subjects: math-8, Science-9,Social Studies-7 5)Favorite stores: Wet seal-99, Mish Mash-80, Journey-67, Claires-79

4. Links… 1. www.mathleague.com/help/data/data.htmlwww.mathleague.com/help/data/data.html 2. www.worksheets.teach-nologly.com/math/graph/www.worksheets.teach-nologly.com/math/graph/