2. The mean of X = 10 and the standard deviation of X = 2. The variable X is linearly transformed such that Xnew = a + bX. The mean of Xnew = 680 and the variance of Xnew = 196. Suppose b is a positive number. What does a equal?

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A: here the graph passes two times  through the x -axis  so there will be two roots

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