Which property is illustrated below?

1 + 7 = 7 + 1

commutative property of addition
distributive property
associative property of addition
identity property of addition

The property that is illustrated below is the commutative property of addition.

Step-by-step explanation:

It shows that the same problem is being shown just the numbers are switched around. The commutative property of addition is when the same addition is being shown but the numbers places are switched around.

- "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."