A random sample for five exam scores produced the following (hours of study, grade) data values:Hours Studied (x)       Test Grade (y)3.5                                         882.4                                         764                                            925                                            851.1                                         60a. Compute the covariance.b. Compute the correlation coefficient

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.