<em>If all values are scaled by a constant, the variance is scaled by the square of that constant: </em>
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Where k is an arbitrary constant. Therefore:
-V(cX) = c2 V(X) is true.
<em>Variance is invariant with respect to changes in a location parameter. That is, if a constant is added to all values of the variable, the variance is unchanged: </em>
D. y=mx+b. m being slope and b being the y intercept. so the equation for the line is y=3x+2 and to be parallel your m must be the same number so D. 3x