A city’s water tank held 12,120 gallons of water at the beginning of the year. Based on monthly data from the reservoir from past years, the equation of the line of best fit for y, the number of gallons of water in the tank, was projected to be y = 680x + 12,120 where x number of months since January 1st. Due to drought conditions, the rate at which water flowed from the reservoir into the tank each month was one-fourth of the projected amount. Identify the transformation required to take the equation y = 680x + 12,120 to an equation of a line of best fit that models the monthly amount of water in the tank under these drought conditions. State the equation, and describe what its graph looks like in relation to the graph of the projected model.