In 1996, the average price for a gallon of gasoline was $1.05. In 2008, the average price for a gallon of gasoline was $3.80. Find the average rate of change in dollars per year.

Question

In 1996, the average price for a gallon of gasoline was $1.05. In 2008, the average price for a gallon of gasoline was $3.80. Find the average rate of change in dollars per year.<help please

anonymous · Answer

Delta in price divided by delta of years.

This is the classic slope formula situation.

anonymous · Answer

(3.80 - 1.05)/(2008-1996)

anonymous · Answer

so i subtract the first year from the second?

anonymous · Answer

See the above ratio I wrote.

anonymous · Answer

ok i solved it i got 2.75/12 what now?

anonymous · Answer

Compute that value. That is the change in gas price per year over that whole period.

anonymous · Answer

$0.23/year

anonymous · Answer

Some years it may have gone up more, some years less. But, on average, it went up by 23 cents a year.

anonymous · Answer

thank you soo much!