Maintenance Month Cost Jan. $ 4,650 Feb. 3,450 Mar. 4,050 Apr. 3,270 May 4,800 June 3,410 July 3,480 Aug. 4,920 Sept. 4,710 Oct. 4,500 Nov. 3,750 Dec. 3,610 Sum $ 48,600 Average $ 4,050 Average cost per hour a (intercept) b (coefficient) Standard error of the estimate R-squared t-value for b Machine Hours 660 500 580 480 680 490 500 740 670 650 530 520 7,000 583 $ 7.00 $89.6408 6.7892 83.4170 0.9838 24.6685 Use the high-low method to generate the equation to estimate future Multiple Choice None of these answer choices are correct. y= 4,050 + 583x y = 90 + 6.8x y= 224 + 7x y= 224 + 6.3x