Question

9. A teacher weighed 120 lbs. in 2008 and weighs 192 lbs. In 2020. What was the rate ofchange in weight and what does it represent?A. The teacher gained 72 pounds per year.B. The teacher lost 4 pounds per year.C. The teacher gained 6 pounds per year.D. The teacher gained 0.16 pounds per year.

Answer 1

The teacher gained 6 pounds per year.

`\text{Rate }=\text{ 6 lbs/year}`

Step-by-step explanation:

Given that a teacher weighed 120 lbs. in 2008 and weighs 192 lbs. In 2020.

The rate of change of the teacher's weight would be;

`\text{rate = }\frac{\text{ Change in weight}}{\text{change in time}}`

Calculating the rate;

`\begin{gathered} \text{Rate }=(192-120)/(2020-2008)=(72)/(12) \\ \text{Rate }=\text{ 6 lbs/year} \end{gathered}`

Therefore, the teacher gained 6 pounds per year.

`\text{Rate }=\text{ 6 lbs/year}`