Question

A gas station sells a coffee mug filled with coffee for $3. For each refill, using the same mug, the gas station charges $1.25 for the coffee. If y represents the total cost and x represents the total number of filled coffee mugs purchased, which function rule describes this pattern?

Answer 1

The cost of refills can be found by multiplying the cost per refill * the number of refills

There is a one-time fee of 3 dollars for the mug, so simply add that to the total so far

Think about how you would represent this as a complete equation with the appropriate variable, coefficient, and constant