Question

Mr. Brown's class is collecting books for a book drive. They started with 2 books. On the first day, they had 6 books. On the second day they had 18 books. Write an equation that models this situation.

A) y = 4x + 2
B) y = 2(3)x
C) y = 3x + 2
D) y = x2 + 2

Answer 1

The answer is b

Aaaaa

Answer 2

we are given

Let's assume total number of books =y

number of days =x

They started with 2 books

so, first term is 2

second term is 6

third term is 18

we can see that this is geometric series

so, firstly we will find common ratio

`r=(6)/(2)= 3`

total number of terms is x+1

now, we can find nth term

`y=2(r)^(x+1-1)`

now, we can plug back r

we get

`y=2(3)^(x)`...........Answer