________ is a measure of a linear relationship between two variables.

A) Variance
B) Proportion
C) Correlation
D) Kurtosis

Correlation is a statistical measure that indicates the extent to which two or more variables are related to each other. It measures the strength and direction of a linear relationship between two variables. Variance is a measure of how spread out a set of data is, proportion is a fraction or ratio of one quantity to another, and kurtosis is a measure of the peakedness or flatness of a distribution. None of these measures specifically represent a linear relationship between two variables.