To make a birthday cake you will need the following ingredients: sugar, flour, butter, eggs, salt, baking soda and vanilla. Of all the ingredients, sugar will make up 21 parts of the entire cake. Which of the following labels should be used for this section of the pie (circle) graph?

Pie:  A pie graph (or circle graph) uses “slices” or “sections” to show size.  

Chart:  A chart is made up of a horizontal line and a vertical line.  The horizontal line displays advancing numbers, letters or names going from left to right along the horizontal bottom line.  The vertical line displays advancing numbers, letters or names going from the bottom to top along the vertical line.