Students Handout Line Graphs Double Bar Graphs A line graph displays data that change over time. A double bar graph displays two sets of data that can be counted. The lengths of the bars are A line graph: used to represent and to compare data. Is easy to draw and to read A double bar graph: Can have a zigzag symbol on the vertical axis Is easy to draw and to read when the data start at a large number Can be used to directly compare two sets of Is best used to show data gathered over time data Can be used to estimate values between data points and beyond data points. (This should be Can only be used to show discrete data done carefully as the trend may not continue.) May be difficult to read accurately depending on the scale used Pictograph Bar Graph Symbols are used to show data in a pictograph. The Bars are used to show data in a bar graph. Numbers key shows what each on the axis show the scale. symbol stands for. Pictograph : Easy to read but not easy to draw Interesting Cannot represent the actual value of data
Students Handout Line Graphs A line graph displays data that change over time. A line graph: Is easy to draw and to read Can have a zigzag symbol on the vertical axis when the data start at a large number Is best used to show data gathered over time Can be used to estimate values between data points and beyond data points. (This should be done carefully as the trend may not continue.) Double Bar Graphs A double bar graph displays two sets of data that can be counted. The lengths of the bars are used to represent and to compare data. A double bar graph: Is easy to draw and to read Can be used to directly compare two sets of data Can only be used to show discrete data May be difficult to read accurately depending on the scale used Pictograph Symbols are used to show data in a pictograph. The key shows what each symbol stands for. Pictograph : Easy to read but not easy to draw Interesting Cannot represent the actual value of data Bar Graph Bars are used to show data in a bar graph. Numbers on the axis show the scale.