Question 665917
points (-11,-15)and (-14,-18) 

{{{m=(y[2]-y[1])/(x[2]-x[1])}}}

{{{m=(-18-(-15))/(-14-(-11))}}}

{{{m=(-18+15)/(-14+11)}}}

{{{m=(-3)/(-3)}}}....here you are dividing two negative numbers and result is a positive number; {{{minus/minus=plus}}} and {{{3/3=1}}}, so your slope is:

{{{highlight(m=1)}}}