# Math 263: Excel Assignment 4 Deb Hughes Hallett January 2010

```Math 263: Excel Assignment 4
Deb Hughes Hallett
January 2010
The value of a business is thought to depend on its operating income (that is, the business’s income after
taxes, excluding the sale of assets like buildings or machinery). You will test this theory by looking at the
NBA teams. The data is in NBA.xlsx. (From Problem 2.19, page 98.)
(a) Make a scatter plot of value (as the response variable) against revenue (as the explanatory
variable). Label the axes. Find the correlation coefficient.
(b) Make a scatter plot of value (as the response variable) against operating income (as the
explanatory variable). Label the axes. Find the correlation coefficient.
(c) Comment on whether revenue or operating income appears to predict the value of the team
Your scatter plot should show the value of the coefficient of determination. (That is, the value of
𝑅 2.)
To make a scatter plot in Excel 2007
1. Select the data, go to the Insert menu, then select Scatter. (Note: Do not use the Line graph