A grocery store offers a service where customers can place an order and have
their groceries delivered to their home for an additional fee. The equation y = 1.1x
can be used to find y, the total cost in dollars, for x, the grocery cost in dollars.
Arlyn has groceries delivered for a total cost of $119.90. He says his grocery cost
must be $108.90. Is Arlyn correct? Explain your reasoning.