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A scale factor is a number which scales, or multiplies, some quantity. In the equation ''y'' = ''Cx'', ''C'' is the scale factor for ''x''. ''C'' is also the coefficient of ''x'', and may be called the constant of proportionality of ''y'' to ''x''. For example, doubling distances corresponds to a scale factor of two for distance, while cutting a cake in half results in pieces with a scale factor of one half. The basic equation for it is image over preimage. In the field of measurements, the scale factor of an instrument is sometimes referred to as sensitivity. The ratio of any two corresponding lengths in two similar geometric figures is also called a scale factor. == See also == * Scale (ratio) * Scale (map) * Scales of scale models * Scaling (geometry) * Scalar (mathematics) * Scaling in gravity * Scaling in statistical estimation * Scale factor (computer science) * Scale factor (cosmology) * Orthogonal coordinates 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「scale factor」の詳細全文を読む スポンサード リンク
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