Question 981063
Only two points are in the description.  (5, 465) and (7, 625).  x is for how many days renting and y is for how much the cost of renting.


slope, {{{(625-465)/(7-5)=80}}}


pick either point:
{{{b=625-80*7}}}
{{{b=65}}}


y=mx+b
{{{y=80x+65}}}