Final answer:
The equation that shows the relationship between the money spent on additional stuffed animals x and the total number of stuffed animals y is y = x + 1.
Step-by-step explanation:
To write an equation that shows the relationship between the money spent on additional stuffed animals x and the total number of stuffed animals y, we can use the information provided.
Madelyn already owns 1 stuffed animal, and additional stuffed animals are priced at 1 per dollar. Therefore, for each additional stuffed animal, the cost is equal to the number of additional stuffed animals. So, the equation that represents the relationship is y = x + 1.