¡! the total square footage of mini storage units being rented in a city is graphed to forecast future demand. the scatter plot has a trend line =0.538+9.02 y = 0 . 538 x + 9 . 02 , where x = 0 is the year 2005 and y is the total area rented (in ten thousand square feet) of all mini storage units in the city. if the total area rented continues to increase at the same rate, about how many square feet of mini storage units will be needed by the year 2018?