A graph is constructed such that time (in seconds) is the x-variable and distance (in kilometers) is the y-variable. If you plot the distance that light travels on the graph, and it travels at a speed of 300,000 kilometers per second, what is the slope of the graph?

Question

anonymous · Answer

Intervals on the x-axis : 1 second 

Intervals on the y-axis : 300 000 km 

Since it's said that the speed of light is 300 000 km / 1 second 

The second interval should be 2 on the x-axis and 600 000 on the y-axis. 

The slope of the graph is (y1 - y2) / (x1 - x2) 

Hence, (600 000 - 300 000) / (2 - 1) = 300 000/1 

Hence, the slope of the graph is 300,000 km/s