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)
795	100.5
294	48.4
562	61.2
208	41.8
513	67.3
518	67.8
914	110.4
729	96.9
777	94.7

A student calculates a linear model
y = _________x+______________ . (Please show your answers to two decimal places)
Use the model to estimate the cost when number of pages is 487.
Cost = $ (Please show your answer to 2 decimal places.)

Answer 1

y = 0.10 x+ 16.49

Estimate the cost when number of pages is 487:
y = 0.10 (487)+ 16.49

y= 65.19

Cost = $ 65.19