<PRE><B>Question 377067</B>
Fixed Cost = $2.50
Variable Cost = $.40 per quarter mile * x, 
where x is the distance traveled, measured in quarter miles.
y = Total Cost = FC + VC
or
y = .4x + 2.5
.

12 miles = 48 quarter miles.
y = .4*48 + 2.5
y = 19.2 + 2.5 
y = 21.7 = $21.70
.
Notice that this equation looks similar to y = mx+b.
.
Done</PRE>