Question 480808
{{{(y-y[1])/(y[2]-y[1])=(x-x[1])/(x[2]-x[1])}}}
Points (-12,8) and (10,-3)
substitute {{{x[1]=-12}}}, {{{y[1]=8}}}, {{{x[2]=10}}}, {{{y[2]=-3}}}
{{{(y-8)/(-3-8)=(x-(-12))/(10-(-12))}}}
{{{(y-8)/-11=(x+12)/22}}}multiply by (-22)
{{{2(y-8)=-(x+12)}}}
{{{2y-16=-x-12}}}
{{{2y=-x-12+16}}}
{{{2y=-x+4}}}divide by 2
{{{y=-(1/2)x+2}}}

The y intercept is (0,2)