You can put this solution on YOUR website! here you have to do this equation
(y2-y1)
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(x2-x1 which is y two minus y one divided by x two minus x 1
so you just input the numbers 7=x1, 3=y1, 2=x2 -12=y2
so you insert them in the order y2 minus y1 over x2 minus x1