Which is an equation that gives the cost c of a ride of m miles where m is an integer?

The cost ( c ) of a ride of ( m ) miles can be represented by the equation ( c = a + b \cdot m ), where ( a ) is the base fare and ( b ) is the cost per mile. For example, if the base fare is $3 and the cost per mile is $2, the equation would be ( c = 3 + 2m ). This equation calculates the total cost based on the distance traveled.