The range of the following relation r {(3, −2), (1, 2), (−1, −4), (−1, 2)} is a: {−1, 1, 3} b: {−1, −1, 1, 3} c: {−4, −2, 2, 2} d: {−4, −2, 2}

D: {−4, −2, 2}

Step-by-step explanation:

The range in this case is the set of all the y-values of the ordered pairs.

In listing the elements in the range, we do not list an element more than once, even though it may appear multiple times in the ordered pairs.

Therefore the range is

D: {−4, −2, 2}

D: : {−4, −2, 2}

Step-by-step explanation:

i got 142 as my answer

step-by-step explanation:

- "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."