Your local gas stations are having a price war during the past seven days they have lowered the price of regular gas by $0.2 each day define a variable then write and solve an equation to find the total change in gas price show your work

Let x denotes the number of days and y denotes the total change in gas price ( in dollars).

Given : During the past seven days the price of regular gas is decreased by $0.2 each day.

Rate of decrease =$0.2 per day

Then , Total change in gas price = Rate of decrease x Number of days

i.e.

i.e.         (1)

To find the total change in gas price in 7 days , we put x= 7 in (1) , we get

Hence, the total change in gas price in 7 days = $1.4

i know the answer is 3

step-by-step explanation: