The correlation coefficient, denoted by r, tells us how closely data in a scatterplot falls along a straight line. The closer that the absolute value of r is to 1, the closer that the data is described by a linear equation.
If r =1 or r = -1 then the data set is perfectly aligned. Data sets with values of r close to zero show little to no str
inequality is difference in size, degree, circumstances, etc.; lack of equality.
aight-line relationship.
definition of Function is a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function).
categorical variable is a variable that can take on one of a limited, and usually fixed, number of possible values, thus assigning each individual to a particular group or "category." In computer science and some branches of mathematics, categorical variables are referred to as enumerations or enumerated types.
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