Question

12. A teacher weighed 148 lbs. in 1999 and weighs 190 lbs. In 2020. What was the rate of change in weight?

Answer 1

Answer:

The teacher gained 2 pounds per year (Option A)

Step-by-step explanation:

Teacher's weight in 1999 = 148 lbs

Teacher's weight in 2020 = 190 lbs

Let the year be represented by x

Let the weight be represented by y

x₁ = 1999, y₁ = 148, x₂ = 2020, y₂ = 190

The rate of change in weight is given by the formula below

`\begin{gathered} \text{Rate = }(y_2-y_1)/(x_2-x_1) \\ \text{Rate = }(190-148)/(2020-1999) \\ \text{Rate = }(42)/(21) \\ \text{Rate = 2} \end{gathered}`

Since the rate of change in weight = 2 lbs/yr, this means that the teacher gained 2 pounds per year