Darnells car used 8 gallons to travel 340. Miles after a machanic worked on the car it used 7 gallons of gasoline to travel 350
miles if the price of gasoline was approximately $4.00 per gallon how much less to the nearest cent per mile did it cost to run the car after the mechanic worked on it
You were going in the right direction but the problem was that you needed to subtract and not add. The formula should be y-y1 / x-x1 iirc. Hope this helped.
