Question

Maria is running a 20-kg race .the graph at the right shows her distance remaining and the race in kilograms over time and hours find a rate of changing for distance remaining during the race

Answer 1

Answer:

-5/2 km/hr

Explanation:

We can find the rate of change for the distance remaining over time at points (2, 15) and (8, 0) using the below formula;

$\text{Rate of Change = }\frac{y_2-y_1}{x_2-x_1}$

where our x1 = 2, y1 = 15, x2 = 8, and y2 = 0.

Let's go ahead and substitute these values into our formula;

$\begin{gathered} \text{Rate of Change = }\frac{0-15}{8-2} \\ =\frac{-15}{6} \\ =-\frac{5}{2} \end{gathered}$

So this means that the distance decreases by 5km in every 2hours.