Chapter 3.2, Problem 3E

Reminder Round all answer to two decimal places unless otherwise indicated.

Gasoline Prices In $1960,$ the average price per gallon of gasoline was $31$ cents per gallon. Form $1960$ to $2000,$ prices increased, on average, by $2.5$ cents per gallon per year. ${}^4$

a. Using $G$ for the price, in cents per gallon, and $t$ for the time, in years, since $1960,$ use a formula to express $G$ as linear function of $t.$

b. What price per gallon does the model yield for $1990?$ (Note: The actual price was $\$1.00$ per gallon.)

c. Use the Internet to find the average price of gasoline for the current year. Does the model from part a give a price near the current price?