Final answer:
The type of proportion that is not recognized as standard is 'Percentile Proportion.' The known types of proportions are Direct Proportion, Inverse Proportion, and Partitive Proportion, which are used to describe relationships between variables or quantities.
Step-by-step explanation:
The student asked which of the following is not a type of proportion: a) Direct Proportion, b) Inverse Proportion, c) Percentile Proportion, or d) Partitive Proportion. A proportion is a mathematical equation that shows that two ratios are equal. It is used to solve problems where the relationship between two quantities is important. The types of proportions include:
- Direct Proportion: where the ratio between two variables is constant. If one variable increases, the other increases at the same rate.
- Inverse Proportion: where two variables have a relationship such that their product is a constant. When one increases, the other decreases proportionally.
- Partitive Proportion: which deals with dividing a quantity into parts that are proportional to a given set of ratios.
The option that is not a recognized type of proportion is 'Percentile Proportion'. There is no standard mathematical concept known as 'Percentile Proportion'. Percentiles relate to the distribution of data points in a set, not to the proportional relationship between two variables. Therefore, the correct answer is c) Percentile Proportion.