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Chapter 4	Corresponds to problems
4.3 Plot points and line of best fit (Linear Regression) Small Large	Sect 4.3 41-46
4.4 Inequalities in a plane. Small Large	Sect 4.4 5-24
4.4 System of inequalities in a plane Small Large	Sect 4.4 29-42
4.6 Absolute value equality Small Large	Sect 4.6 7-32
4.6 Absolute value inequality (less than) Small Large	Sect 4.6 43-61
4.6 Absolute value inequality (greater than) Small Large	Sect 4.6 43-61