Question 831311
the basic equation is a linear equation 
y=mx+b
or
t=mr+db
75=180*r+db,
67.50=150*r+db
where d=1
75=180*r+b,
67.50=150*r+b
b = 30., r = 0.25
.25 cents a mile
and base rate of 30 dollars a day