Question

Wich expression can be used to find the slope of a line containing the points (-3,2) and (7,-1)

Answer 1

`A(x_1;\ y_1);\ B(x_2;\ y_2)\\\\\text{The slope:}\ m=(y_2-y_1)/(x_2-x_1)`



`\text{We have:}\\(-3;\ 2)\to\ x_1=-3;\ y_1=2\\(7;\ -1)\to x_2=7;\ y_2=-1`


`\text{substitute}\\\\m=(-1-2)/(7-(-3))=(-3)/(10)=-(3)/(10)`