Question 353655
Your numerator is incorrect. 
{{{m=(y[2]-y[1])/(x[2]-x[1])=(4-(-2))/(1-3)=(4+2)/(-2)=6/(-2)=highlight(-3)}}}
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{{{drawing(300,300,-5,5,-5,5,circle(3,-2,0.3),circle(1,4,0.3),grid(1),graph(300,300,-5,5,-5,5,-3x+7))}}}