During 7th grade, you will learn about reading and interpreting charts and graphs. Charts and graphs come in many different styles and each has a specific way it needs to be interpreted. Below, you will find examples of the different types of charts and graphs that will be covered during 7th grade and they different ways to interpret them.
Stem and Leaf Plots
A stem-and-leaf plot is a specific type of table where each data value is split into a "leaf" which is usually the last digit, and a "stem" which usually consists of the other digits.
In a stem-and-leaf plot, the "stem" values are listed vertically down the side, like the greeen values to the left.
The "leaf" values are listed left to right next to their respective "stems", like the blue values to the left.
In a stem-and-leaf plot, the "stem" values are listed vertically down the side, like the greeen values to the left.
The "leaf" values are listed left to right next to their respective "stems", like the blue values to the left.
Line Graphs
A line graph shows information that is connected in some way, most often a change over time.
The independent variable, the one that you are measuring against, goes on the x-axis (horizontal). This is most often some measurement of time. In the example on the left, the independent variable is each day, one after another.
The dependent variable, the one that changes based on your independent variable, goes on the y-axis (vertical). In the example on the left, the dependent variable is the number of facts correct.
The independent variable, the one that you are measuring against, goes on the x-axis (horizontal). This is most often some measurement of time. In the example on the left, the independent variable is each day, one after another.
The dependent variable, the one that changes based on your independent variable, goes on the y-axis (vertical). In the example on the left, the dependent variable is the number of facts correct.
Venn Diagrams
Venn Diagrams are used to show how sets of data interact. They usually have 2 or 3 main catagories and intersections between those catagories.
The individual catagories (such as Soccer and Tennis to the left) show the students who only play that sport.
The intersection between those two catagories, where the circles overlap, shows students that play both of those sport.
If a number or data value appears outside of all circles, it means that value does not fit into any catagory.
The individual catagories (such as Soccer and Tennis to the left) show the students who only play that sport.
The intersection between those two catagories, where the circles overlap, shows students that play both of those sport.
If a number or data value appears outside of all circles, it means that value does not fit into any catagory.
Bar Graph
A bar graph is a visual representation of data using colored bars to represent each category.
As in all graphs, the x-axis on a bar graph has the independent variable, usually the categories of types of items being measured.
The y-axis holds the dependent variable, the measurement of the graph.
On a bar graph, both axises and the chart itself should have titles to help the reader understand exactly what they are looking at on the graph.
As in all graphs, the x-axis on a bar graph has the independent variable, usually the categories of types of items being measured.
The y-axis holds the dependent variable, the measurement of the graph.
On a bar graph, both axises and the chart itself should have titles to help the reader understand exactly what they are looking at on the graph.
Circle Graphs/ Pie Charts
A circle graph is a graph that shows parts of a whole. For instance, the circle graph to the left shows the number of students out of the WHOLE class that got various grades.
The pieces in a circle graph are determined using percentages. Take the number of students who got A's in the class. 4 out of 28 is roughly 14.3%, so the A catagory takes up 14% of the circle.
Like all charts and graphs, a circle graph should have a chart title to explain the graph as a whole as well as labels for each piece of the circle.
The pieces in a circle graph are determined using percentages. Take the number of students who got A's in the class. 4 out of 28 is roughly 14.3%, so the A catagory takes up 14% of the circle.
Like all charts and graphs, a circle graph should have a chart title to explain the graph as a whole as well as labels for each piece of the circle.