Splitting proportional/graduated symbols using QGIS

How do I split a shape in QGIS?

Quote from video: And for the first feature. That I want to show you guys it's called the split feature with polygons. So I'm gonna go to my edit drop-down box and I'm going to click on split feature.

How do you do a proportional symbol map in QGIS?

In the Style menu, set your classification to “Graduated”. Then, double click on your symbol. This will take you to a menu where you have the option of changing your symbol layer type from “Simple fill” to “Centroid fill”. Once you have done that, see the symbol layers bar in on the left and click Marker.
 

How do I use graduated symbols in QGIS?

If you have numeric data you want to symbolize (i.e. total population) choose “Graduated” symbology.

1. Next to the Column option, use the drop-down arrow to select Graduated, and select a field with numerical data.
2. Choose a classification mode, define the number of classes, and click on Classify.