Answer:
≈$.12 average price of gallon per year increase
Step-by-step explanation:
Given:
$1.58 in the year 1997
$3.11 in the year 2010
Conclude:
In (2010 -1997=)13 years the prices increased by (3.11-1.58 =)1.53 dollars.
The average rate of change in the price of a gallon of gasoline per year
1.53price per gallon /13 years ≈$.12/year
Interpret the result:
Each year since 1997, an increase of about $.12 will result in a price of about $3.11 in the year 2010.
