Precalculus chapter 1 : Function, Colorful Math book, preparation for exam, lessons and excercies: More than 150 pages of good Lessons and exercices ... (210.1mm x296.9mm) (Precalculus 2 edition)

About the book

Introduction to FunctionsToward the end of the twentieth century, the values of stocks of internet and technology companies rose dramatically.As a result, the Standard and Poor’s stock market average rose as well. The graph above tracks the value of that initialinvestment of just under $100 over the 40 years. It shows that an investment that was worth less than $500 until about1995 skyrocketed up to about $1,100 by the beginning of 2000. That five-year period became known as the “dot-combubble” because so many internet startups were formed. As bubbles tend to do, though, the dot-com bubble eventuallyburst. Many companies grew too fast and then suddenly went out of business. The result caused the sharp declinerepresented on the graph beginning at the end of 2000.Notice, as we consider this example, that there is a definite relationship between the year and stock market average. Forany year we choose, we can determine the corresponding value of the stock market average. In this chapter, we willexplore these kinds of relationships and their properties.