direct variation

American  

[di-rekt vair-ee-ay-shuhn] / dɪˈrɛkt ˌvɛər iˈeɪ ʃən /

noun

1. a proportional relationship in mathematics, wherein one variable equals another variable multiplied by a constant.

2. an equation expressing this relationship.

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Example Sentences

There is thus, according to Weismann, nothing to direct variation to certain organs, or to guide and combine the variations of these organs along certain lines, except natural selection.

From Project Gutenberg