Question

Zahra runs an 800 meter race at a constant speed. Which graph shows her distance from the finish line during the race?

Answer 1

bottom left

Explanation:

Answer 2

The graph is attached below.

Explanation:

Given:

Zahra runs a 800-meter race at a constant speed.

Race starts from the finish line.

Finish line is at a distance of 800 m from the starting point.

Time is plotted on the x axis and Distance is plotted on the y axis.

So, the graph must start from the
`800^(th)` mark on the y axis when time is 0.

Now, the speed is constant which means that the slope of the line of distance versus time is a straight line because,

Speed
`=(Distance)/(TIme)`.

Now, the graph should have the following properties:

1. Starting point of the graph should be (0, 800).

2. Final point of the graph should be (t, 0).

3. Slope should be constant everywhere. So, the graph must be a straight line.

Thus, the graph is a line joining the points (0, 800) and (t, 0) as shown below.