Question 1114465
y, total rental cost
x, how many miles driven


Two points (x,y) described:  (200, 25) and (300, 35)

{{{y=mx+b}}}
{{{y=((35-25)/(300-200))x+b}}}
{{{y=(5/100)x+b}}}
{{{y=(1/20)x+b}}}
-
{{{b=y-x/20}}}
{{{b=25-200/20}}}
{{{b=25-10}}}
{{{b=15}}}
-
{{{highlight(y=x/20+15)}}}



The rate per mile charge is  {{{1/20}}} or  0.05 dollars per mile.
The base fee to rent any car is  $15.