Question 1043862

{{{m=(y2-y1)/(x2-x1)}}}
{{{m=(3.95-3.75)/(54-50)}}}


slope is {{{1/20}}}
{{{y=(1/20)*x+b}}}
{{{3.75=(1/20)*50+b}}}
{{{3.75=2.5+b}}}
{{{1.25=b}}}
{{{y=(1/20)*x+1.25}}}
{{{cost(y)=(1/20)*x+1.25}}}