Determine whether each relationship is a function. explain. (2,9), (3,12), (4,12), (2,8), (1,6)

  Not a function

Step-by-step explanation:

The relation gives more than one "y" value for the "x" value of 2, so the relation is not a function. A function maps each domain value to exactly one range value.

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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.