Let X be a random variable with the following probability distribution |-3 6 9 1 1 1 f (x) 6 3 A.) Find E(X). B.) Calculate E[(2X + 1)²)- O 5.5 4.5 6.0 6.5 C.) Find Var(X).

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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.