The total costs to individuals and companies to prepare their taxes are shown in Table 14 for various years.
Table 14 Total costs to individuals and Companies to prepare taxes
YearTotal Cost (billions of dollars)
1990…………………………..80
1995…………………………108
2000…………………………172
2005…………………………260
2010…………………………368
2015…………………………420
Let c be the total annual cost (in billions of dollars) to individuals and companies to prepare taxes at t years since 1990.
a. Construct a scatterplot.
b. Is the association positive, negative, or neither? What does that mean in this situation?
c. The mean price of all goods and services increased by a factor of 1.80 from 1990 to 2015. Did the total cost to individuals and companies to prepare taxes grow by a smaller, equal, or greater factor for that period?