Topic 3

Topic Standards

7.R.1.a Decide whether two quantities are in a proportional relationship (e.g., by testing for equivalent ratios in a table). 

7.R.1.b Represent and solve authentic problems with proportions. 

8.A.2.c Graph proportional relationships and interpret the rate of change.  

Topic Vocabulary

Proportional Relationship

A relationship between two quantities in which their ratio is always the same. A proportional relationship can be represented by an equation such as y = kx.

Proportion

An equation that states that two ratios or rates are equal. Example: ²⁄₃ = ⁶⁄₉

Constant of Proportionality

The constant ratio between two quantities in a proportional relationship. It is represented by k in the equation y = kx.