假设x=(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20),y=( 2.94, 4.53, 5.96, 7.88, 9.02, 10.94, 12.14, 13.96, 14.74, 16.68, 17.79, 19.67, 21.20, 22.07, 23.75 ...