Answer:
Explanation:
We can use algebra to determine how many years it has been since the cost of a box of pencils was $0.00, and therefore calculate how many years the price has been increasing by $1.10 per year.
Let's say that x is the number of years since the cost of a box of pencils was $0.00.
If the price of a box of pencils is increasing by $1.10 per year, then the cost of a box of pencils x years after it cost $0.00 would be:
$0.00 + ($1.10 * x)
We know that the current cost of a box of pencils is $2.19. Setting this equal to the expression above, we can solve for x:
$0.00 + ($1.10 * x) = $2.19
$1.10 * x = $2.19
x = $2.19 / $1.10
x = 1.99
So, it has been approximately 1.99 years (or just under 2 years) since the cost of a box of pencils was $0.00, and the price of a box of pencils has been steadily increasing by $1.10 per year during that time.