Question

It costs $6 to take 1 dog to the dog beach. It costs $1 more for each additional dog.

Answer 1

And so? Please share the directions.

Total cost = $6 + ($1/ each add'l dog) * (number of add'l dogs)

Answer 2

If C is the overall cost and x is greater than 1, the equation would look something like this:
C=6+x
If x is equal to 1
C=6