Best answer gets !
does the construction demonstrate how to copy a segment correctly by hand?
yes; the compass was kept at the same width as segment ab to create the arc from point c.
yes; a straightedge was used to create ray c.
no; the compass was not kept at the same width as segment ab to create the arc from point c.
no; a straightedge was used to create ray c.

no; the compass was not kept at the same width as segment ab to create the arc from point c

- "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."