Reasoning about rate - yellow bowties
Drag the YELLOW dots to adjust the angles of the bowtie.
Drag the BLUE dot to shift the bowtie up and down.
Drag the GREEN dot to shift the shape of the bowtie
from left to right.
The right hand panel shows the area of the bowtie.
How does the area of the bowtie vary as you drag
the GREEN and BLUE dots?