Use the table feature of a graphing calculator to do these exercises. (See Example 1.)Heal...

Use the table feature of a graphing calculator to do these exercises. (See Example 1.)

Health The number of emergency-room physicians (in thousands) working annually in the United States can be approximated by

where x is the number of years since 1980.* Find the number of emergency-room physicians working in 2006.

Example 1

Business

Use the table feature of the graphing calculator to find the projected sales of the company in Example 10 for years 5 through 10.

Enter the sales equation y = .07x2 − .05x3 + 2x2 + 7x + 62 into the equation memory of the calculator (often called the Y = list.) Check your instruction manual for how to set the table to start at x = 5 and go at least through x = 10. Then display the table, as in Figure 3.2. The figure shows that sales are projected to rise from $184, 500 in year 5 to $982, 000 in year 10.

*Statistical Abstract of the United States: 2008.