once you graph it hit 2nd (the blue button) and graph
that takes you to a table of coordinates
on the left is x coordinates and on the right is y coordinates and an empty box
(you may have to scroll up/down in order to get ( x, 0)
the least common denominatore of 7 and 2 is 9
- "runner b is moving at a slower rate."
- "the graphs shown are graphs of distance(km) against time(min).
the slopes of this graphs are are given by:
slope = (change in y)/(change in x)
= (change in distance)/(change in time)
this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.
taking each division in the graph to represent 1 on both axis:
runner a ⇒ speed = (2-0)/(1-0)
= 2 km/min
runner b ⇒ speed = (3-0)/(3-0)
= 1 km/min
this shows that runner b is moving at a slower rate."