Question

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)
863	133.82
226	53.64
584	95.76
627	105.78
449	86.86
630	100.2
512	97.68
729	117.06
889	148.46

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 331.
Cost = $ (Please show your answer to 2 decimal places.)

Answer 1

The detailed solution is given in the pictures below. All answers are approximated and properly rounded off.

Please go through them carefully specially the notations.

Hope the solution helps. Thank you.

(Please do comment if further help is required)