Your local gas stations are having a price war. During the past 7 days they have lowered the price of regular gas by $.02 each day. Define a variable. Then write and solve an equation to find the total change in gas price. Show your work. (4 points)

Question

Your local gas stations are having a price war. During the past 7 days they have lowered the price of regular gas by $.02 each day. Define a variable. Then write and solve an equation to find the total change in gas price. Show your work.  (4 points)

anonymous · Answer

does anyanyone know how to do this

anonymous · Answer

If y is current price. x is the amount of days since the price war started, and b is the original price then

y = - 0.02x + b

The change in gas price would just be the original minus the current, or

b - (-0.02x + b) = 0.02x