Statistics students in Oxnard College sampled 9 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data are shown below: Number of Pages (xx) Cost(yy) 605 43.35 844 70.08 525 47.75 303 24.21 341 36.87 734 56.38 928 65.96 939 81.73 831 76.17 A student calculates a linear model yy =  xx + . (Please show your answers to two decimal places) Use the model to estimate the cost when number of pages is 223. Cost = $ (Please show your answer to 2 decimal places.)

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