This is the table for the billions of dollars in book sales for the first four years after 1990. The equation y=19(1.057)x represents book sales in billions of dollars since 1990. Let x represent the number of years. Let x=0 represent book sales in 1990. They have been rounded to the nearest whole number. Years after 1990 x 1 2 3 4
Billions of dollars y 20 21 22 23

Which column is incorrect?

1

2

3

4