Sam's dog weighs 72 pounds. the vet suggests that for the dog's
health, its weight should decrease by 12.5 percent. according to the
vet, what is a healthy weight for the dog? (lesson 5.1)

ANSWER:

According to the vet healthy weight of the dog is 63 pounds.

SOLUTION:

Given, Sam's dog weighs 72 pounds.  

The vet suggests that for the dog's health, its weight should decrease by 12.5 percent.

Now, we need to find the healthy weight of a dog.

Healthy weight of dog = present weight of dog – 12.5 percent of its present weight

Healthy weight = 72 – 12.5 % 72

= 72 – 9  = 63 pounds

Healthy weight of the dog is 63 pounds

Hence, according to the vet healthy weight of the dog is 63 pounds.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value