Notes on Proportions

Copy the following into your notes. The rest of the class period will be spent viewing examples of proportions.

1. Definition: A proportion shows a relationship between two varying quantities where the ratio between the two quantities remains constant.
2. Characteristics:
1. Proportions have a constant ratio of y/x.
2. The graph of a proportion will pass through the origin.
3. The points on a graph of a proportion are collinear.
4. The equation of a proportion is in the form of y=ax, where a is the constant of proportionality.
5. The graph contains the point (1, a), where a is the unit rate.