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

Answer 1

1 23
2 24
3 25
4 27

Answer 2

@Chlorophyll what do I do first?

Answer 3

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

Answer 4

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

Answer 5

I suppose the results are round up to whole numbers!

Answer 6

@ramirokool Hello...O

Answer 7

y = 21 * ( 1.06 )^x

Answer 8

For my answer I got
2 24

Answer 9

@Chlorophyll

Answer 10

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

Answer 11

So my answer would be B. 24 @Chlorophyll

Answer 12

The question " Which year has an incorrect amount? "

Answer 13

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