How much money will the child earn if all 50 cards are sold and the agreed upon $15 is sent back to the company? Suppose a company offered to send 50 greeting cards to a child to sell to relatives, friends and neighbors. The child was to sell them for 50 cents each, and had to send $15 back to the company. Here is a graph of a linear model representing the situation. The input (horizontal value) represents the number of cards sold, and the output (vertical value) represents the child's profit in dollars