Answer:
A relationship in algebraic equation form is,

Explanation:
Given the statement:
Cost per mile is calculated by dividing total cost by total miles.
Using the notation:
P represents the Cost per mile
C represents the total cost
M represents the total miles
"dividing" means

"dividing total cost(C) by total miles(M)" translated to

then;
Cost per mile(P) is calculated by:

Therefore, a relationship in algebraic equation form is,
