Let x and y be discrete random variables with joint probabilty density function (x+y), x-1,2,3;y=1,2 f(x,y)=< 21 other wise Find p(3x + 2, 4y – 3) Select one: a. 0.1038 b. -0.01038 C. -0.1038 d. 0.01038

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Q: (a) Var(X + Y ) = Var(X)+ Var(Y) (b) Ε(XY) - (EX) (EYΥ) (c) E(X + Y ) = EX+ EY

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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.