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Chapter 1
Section 1.1, Extension of Exercise 63 (page 80)Go to the U.S. Census Bureau http://www.census.gov/. Click on "Statistical Abstract" under "Special Topics," then click on "USA Statistics in Brief," then click on "Business," and then record the new home sales by year given under "Business."
(a) Graph the scatter plot of the annual sales
as function of the year.
(b) Use your grapher to find a linear regression for the data and
overlay its graph on a scatter plot of the data.
(c) Use your grapher to find a quadratic regression for the data
and overlay its graph on a scatter plot of the data.
(d) Which of the two models appears to be a better fit?
(e) Use the two models to predict the number of new home sales
for the year you are working this exercise.
Section 1.2, Extension of Exercise 83 (page 101)
A function f that is bounded below has an infinite number of lower bounds, but there is always a greatest lower bound, that is, a lower bound that is greater than all the others. This greatest lower bound may or may not be in the range of f. For each of the functions listed in Exercise 69, find the greatest lower bound and tell whether or not it is in the range of the function.
Section 1.4, Extension of Exercise 75 (page 130)
Suppose the ball is traveling at 120 ft/sec.
(d) Repeat parts (a)–(c) for this ball speed.