The following table shows the percent increase of donations made on behalf of a non-profit organization for the period of 1984 to 2003. Use a graphing calculator to make a scatter plot of the data. Find an equation for and graph the line of regression. Then use the equation to predict the percent donated in the year 2015.
Year
1984 1989 1993 1997 2001 2003
Percent
7.8 16.3 26.2 38.9 49.2 62.1
Select one:
a. 85.7
b. 83.1
c. 96.5
d. 79.8
how to solve ?
+33616 "The following table shows the percent increase of donations made on behalf of a non-profit organization for the period of 1984 to 2003. Use a graphing calculator to make a scatter plot of the data. Find an equation for and graph the line of regression. Then use the equation to predict the percent donated in the year 2015. ..."
Here's the graph and my calculation of the best-fit straight line.
Note that in the function pc the year is relative to 2000. For example, for the year 2015 you would just use 15.
I don't get any of the listed results for the year 2015.
(Note that in real life it wouldn't be sensible to extrapolate so far from the measured data).
