Question 1111827
Your description gives two data points of x for distance and y for cost:
(26, 62.5) and (38, 65.5).


Now you can determine the equation of the line which goes through the two points.


Starting in the point-slope form and choosing the first ordered pair point:
{{{y-62.5=((65.5-62.5)/(38-26))(x-26)}}}

Simplify this equation.


After that, just substitute x=54 to find corresponding y, cost for 54 miles.