Suppose the equation, y = 21(1.06)x, represents book sales in billions of dollars since 2000. X represents the number of years after 2000. The table below shows the book sales for the four years after 2000, to the nearest billion. Which year has an incorrect amount?
Years after 2000 (x)
1
2
3
4
Billions of dollars (y)
23
24
25
27

Question

Suppose the equation, y = 21(1.06)x, represents book sales in billions of dollars since 2000. X represents the number of years after 2000. The table below shows the book sales for the four years after 2000, to the nearest billion. Which year has an incorrect amount?
Years after 2000 (x)
1
2
3
4
Billions of dollars (y)
23
24
25
27

anonymous · Answer

1 23
2 24
3 25
4 27

anonymous · Answer

@Chlorophyll what do I do first?

anonymous · Answer

Just replace:
x = 1 for year 2001
x = 2 for year 2002 ...

anonymous · Answer

1 goes with 23
2 goes with 24
3 goes with 25
4 goes with 27

anonymous · Answer

I suppose the results are round up to whole numbers!

anonymous · Answer

@ramirokool Hello...O

anonymous · Answer

y = 21 * ( 1.06 )^x

anonymous · Answer

For my answer I got
2 24

anonymous · Answer

@Chlorophyll

anonymous · Answer

In the year of 2002, the book sale is 24 bil. is the right amount!

anonymous · Answer

So my answer would be B. 24 @Chlorophyll

anonymous · Answer

The question " Which year has an incorrect amount? "

anonymous · Answer

@ramirokool I suppose you understand how to round up to the whole numbers :/