The cost of a leading liquid laundry detergent in different sizes is given below. Size (ounces) Cost ($) 16 3.49 32 4.29 64 5.19 200 10.19 Part (a)         Part (b)   Part (c) Calculate the least squares line. Put the equation in the form of: ŷ = a + bx. (Round your answers to three decimal places.) ŷ = + x Part (d) Find the correlation coefficient r. (Round your answer to four decimal places.) r =

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