Experimental data are collected as: x[100]={1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100}; y[100]={-92.3973,14.0677,98.9626,49 .6151,111.88,-38.7967,52.1535,-101. 325,65.6111,125.129,151.762, -123.132,-41.8744,-39.3356,-99.7856 ,-128.881,58.5477,-111.692,-75.3057 ,4.4723,-100.051,169.051, -15.6953,58.3125,147.346,10.9835,42 .3421,166.697,-105.534,-90.2199,151 .189,130.022,-8.1448,-51.3493, 164.427,119.154,-99.2704,155.986,13 3.212,118.035,13.1819,139.678,81.51 78,-12.4377,-11.7671,146.627, -25.787,107.25,19.8867,15.6437,112. 871,122.552,8.42037,-10.1364,146.68 2,178.531,203.565,-70.7871, 171.256,-50.6232,193.836,-34.7733,- 68.9564,25.3423,75.6537,21.5484,46. 5259,-64.22,-13.5792, 74.9213,-26.6872,30.5302,169.534,-3 6.7224,65.4419,113.978,68.1137,181. 414,127.76,145.447,75.5486, 164.201,169.504,110.07,96.713,114.9 74,155.46,2.72803,-59.9407,13.426,2 9.9344,-11.052,176.639, 162.505,-18.3784,184.418,234.104,12 7.227,145.18,0.440172}; Obtain the regression line in the form of y = a x + b.