Cost of Textbooks The editor of a higher education book publisher claims that a large part of the cost of books is the cost of paper. This implies that larger textbooks will cost more money. As an experiment to analyze the claim, a university student visits the bookstore and records the number of pages and the selling price of twelve randomly selected textbooks. These data are listed below. 
{Cost of Textbooks Narrative} Determine the least squares regression line.
Definitions:
Photoperiodism
The physiological response (such as flowering) of plants to variations in the length of daylight and darkness.
Phytochrome
A light-detecting pigment found in plants that regulates various developmental processes by responding to red and far-red light.
Necrotic Lesions
Areas of dead tissue on an organism that result from disease, injury, or lack of blood supply.
Casparian Strips
Regions of cell walls in plant roots that form a barrier to passive water and solute movement, helping to regulate water and nutrient uptake.
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