Compute the expected value and the variance for x and y. Develop a probability distribution for x + y. Using the result of part (b), compute E(x + y) and Var (x + y). Compute the covariance and correlation for x and y. Are x and y positively related, negatively related, or unrelated?

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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.