Question

in which story could you use the quotient -4 ÷ 8 to answer the question?
tuckers vet recommended that his dog lucy lose 8 pounds to get to a healthier weight. the vets recommended diet plan takes 4 weeks. on average, how much should lucys weight change each week?
tuckers vet recommended that his dog lucy lose 4 pounds to get to a healthier weight. the vets recommended diet plan takes 8 weeks. on average, how much should lucys weight change each week?

Explanation:

Step1: Analyze weight - change problem

We want to find the average weight change per week. A loss of weight is represented by a negative number.

Step2: Calculate average weight change for first story

The dog needs to lose 8 pounds in 4 weeks. The average weight change per week is $\frac{- 8}{4}=-2$ pounds per week.

Step3: Calculate average weight change for second story

The dog needs to lose 4 pounds in 8 weeks. The average weight change per week is $\frac{-4}{8}=-\frac{1}{2}$ pounds per week, which is the given quotient $-4\div8$.

Answer:

Tucker's vet recommended that his dog Lucy lose 4 pounds to get to a healthier weight. The vet's recommended diet plan takes 8 weeks. On average, how much should Lucy's weight change each week?