Answer:
The rate of change in price is
$0.2 per year
Explanation:
This problem bothers on rates
Given data
Initial price of milk = $2.7
Final price of milk = $3. 5
Time duration = 4 years
Hence the rate of the change of price can be estimated as follows
= Δ in price/Δin time
= (Final price - initial price)/4
=3.5-2.7/4
=0.8/4
=$0.2 per year