Combining Bar Graphs and Line Graphs

Hello, class! Today we will be learning about combining bar graphs and line graphs! It may seem odd, but it is in fact a real thing that people all over the world commonly use.

The title is just as it sounds; we combine a bar graph and a line graph. Here's a good example of one: http://www.ciese.org/curriculum/weatherproj2/images/graph_combo.gif.

It may look big and scary and complicated, but as we progress you will see it really isn't.

As you can see, there is an added vertical axis! This time the title is 'Temperature (°C)'. You read the line graph with the scale on the right hand side vertical axis! It looks simple now, right? And as you expect, you read the bar graphs with the left hand vertical axis. 

You would make this the way you make a bar graph, just add a few extra steps to add in another vertical axis, draw in the line graph, and you're done!

If you were wondering, there is no specific name for this type of graph. However, I personally like to call it a 'Bar and Line Graph Combo'.