Additive Relationship
My Definition
Key Characteristics
The following are true of an additive relationship:
- Two quantities can be expressed as related to each other through addition.
- It can be written as y = x + a, where y is related to x through the addition of a constant, a. The value for a may be positive or negative.
Example
Situation: John will always be four years older than Sue.
This table shows an additive relationship between x and y, represented with
y = x + 4.
Video Transcript (PDF)
Non-example
Situation: To recreate the recipe, the amount of sugar must always be 12 times the amount of salt. This is a multiplicative relationship. It can be written y = ax, where y is related to x through multiplication by a constant, a.