1. Line Graphs SWBAT analyze line graphs and double line graphs; make line graphs and double line graphs

2. Definitions Line graph a way to organize data that shows changes made over time. a way to organize data that shows changes made over time.Trend A rise or fall in the line between two points A rise or fall in the line between two points Double line graph Compares two sets of data over time Compares two sets of data over timeKey Shows which line graph represent each data set Shows which line graph represent each data set

3. Creating a Line Graph Draw a horizontal and vertical axes on grid paper Choose an appropriate scale for both sets of data Label both axes. Choose colors if your are making a double line graph, and create a key Plot a point for each data item Connect the points with line segments Write a title for the graph

4. Examples Create a graph for the following data chart Stock at Sam’s Shirts MonthJeansShorts Oct525175 Nov425225 Dec450210 Jan475200 Feb480185

5. Examples When was the difference between the stock of jeans and shorts the greatest? When was it the least? When was the total stock of jeans and shorts the greatest? When was the total stock the least?

6. Examples Create a graph for the following data Average Height (in cm) AgeBoysGirls 12150152 13157157 14163160 15169162 16174162

7. Examples At what ages are boys taller than girls? At what ages are the average heights of boys and girls the same?

8. Average Monthly Temperature MonthMiamiChicago Jan6727 Feb6829 Mar7239 Apr7550 May8050 June8167 July8372 Aug8371 Sept8263 Oct7854 Nov7443 Dec6930

9. Examples In which city was the average temperature 68 in June? During which months was the difference in average temperature the greatest? During which months is the difference in average temperature 20? Describe the general trend you see in each city’s average monthly temperature?