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

Answer with explanation: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 dayThen , Total change in gas price = Rate of decrease x Number of daysi.e.[tex]y= 0.2 \times x[/tex]i.e. [tex]y=0.2x[/tex]         (1)To find the total change in gas price in 7 days , we put x= 7 in (1) , we get [tex]y=0.2(7)=1.4[/tex]    Hence, the total change in gas price in 7 days = $1.4