Question 1159296
Slope is  {{{(3-(-1))/(2-(-2))=4/4=1}}}.


{{{y=mx+b}}}

{{{y-mx=b}}}

{{{b=y-mx}}}

m is for "slope".


Substitute either of the given points to be on the line:
{{{b=3-1*2}}}
{{{b=3-2}}}
{{{b=1}}}


{{{highlight(y=x+1)}}}