Inverse proportion is the relationship between two variables when their **product is equal to a constant**. Looking at the product (workers * time) one can figure out if a relationship is antiproportional. This product (in our example: 40) is called **anti proportional constant**.

Workers(number) | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 |

Time(in days) | 8 | 4 | 2.67 | 2 | 1.6 | 1.33 | 1.14 | 1 | 0.89 | 0.8 | 0.73 | 0.67 | 0.62 | 0.57 | 0.53 | 0.5 | 0.47 | 0.44 | 0.42 | 0.4 |

WorkersTIMES Time | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 |

anti proportional constant = 40

- Antiproportional relationships
- Graph of a antiproportional relationship
- Proportional factor
- Rule of Three antiproportional
- Differentiation of relationship types