3.MD.B.3
Draw a scaled picture graph and a scaled bar graph to represent a data set with several categories. Solve one- and two-step "how many more" and "how many less" problems using information presented in scaled bar graphs. For example, draw a bar graph in which each square in the bar graph might represent 5 pets.
Draw and read scaled picture graphs and bar graphs with several categories (can have more than three). Given a set of data, choose the appropriate scale. For example, if your data contains 25, 75, 100, 150, 200, and your options for scales are 20, 25, or 100, you should choose 25. Solve one- and two-step “how many more” and “how many less” problems using scaled bar and picture graphs.
Outside of math education, I have only seen pictograms and picture graphs with whole numbers of objects. For example, 1 in 9 people might be represented by 8 people being grayed out. I have never seen a quantity depicted by halves of shapes, such as in this video, and this one. Thus, I do not recommend teaching picture graphs in this manner.