Connections in Proportional Reasoning: Levers, Arithmetic Means, Mixtures, Batting Averages, and Speeds
Alfínio Flores · School Science and Mathematics · 1995
The lever is used to give an alternate physical representation of, and as a means to connect, situations that involve weighted averages and inverse proportionality, such as arithmetic means, mixtures, batting averages, and speeds. Geometric representations of the situations are also provided as another way to make connections.