3 Is the following mapping of a relation a function and why?
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OO u w
A No, because each x-value has only one y-value paired with it.
B) Yes, because the x-value 11 has two y-values paired with it.
No, because the x-value 11 has two y-values paired with it.
D) Yes, because each x-value has only one y-value paired with it.

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

do i do it on a graph?

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.