Question

at the beginning of each year, elena stepped on her scale and resolved to become more fit. elenas weight according to the graph, what was the rate of change between 2016 and 2020? kilograms per year

Explanation:

Step1: Identify the weight in 2016 and 2020

In 2016, Elena's weight is 300 kg. In 2020, her weight is 210 kg.

Step2: Calculate the change in weight

The change in weight $\Delta W = 210 - 300 = -90$ kg.

Step3: Calculate the change in time

The change in time $\Delta t = 2020 - 2016 = 4$ years.

Step4: Calculate the rate of change

The rate of change is $\frac{\Delta W}{\Delta t}=\frac{-90}{4} = -22.5$ kilograms per year.

Answer:

-22.5