Suppose that z is a linear function of x and y with slope 3 in the direction and slope 2 in the y direction. (a) A change of -0.3 in x and -0.3 in y produces what change in z? change in z = (b) If z = 4 when x = 6 and y 7, what is the value of z when x = 6 and y = 7.1? =

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