Added simple linear regression
Added simple linear regression

mikarubi/thunder,zhwa/thunder,kcompher/thunder,kcompher/thunder,broxtronix/thunder,poolio/thunder,j-friedrich/thunder,broxtronix/thunder,thunder-project/thunder,pearsonlab/thunder,jwittenbach/thunder,zhwa/thunder,pearsonlab/thunder,j-friedrich/thunder,oliverhuangchao/thunder,poolio/thunder,oliverhuangchao/thunder,mikarubi/thunder,kunallillaney/thunder,kunallillaney/thunder