Which statement is most likely correct about the line?
a: it can be the line of best fit because it is closest to most data points.
b: it can be the line of best fit because it passes through all the scatter points.
c: it cannot be the line of best fit because it does not pass through all the points.
d: it cannot be the line of best fit because it does not pass through the first and last points.

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step-by-step explanation:

i dont really.know

- "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)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."