Aprocess where ordered pairs of points that solve an equation are found. the points are plotted on a grid and then connected with a smooth curve.

Point-by-point graphing.

Step-by-step explanation:

Point by point graphing is a process where ordered pairs of points that solve an equation are found. The points are plotted on a grid and then connected with a smooth curve. Points are ploted as per the coordinate represented in the equation. Coordinate give the value for x and y axis, which is plotted on graph, which show the frequency of data.

- "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."

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step-by-step explanation:

because that's the answer