Which of the following sets of ordered pairs is a function? A { ( 6 , 1 ) , ( 7 , 3 ) , ( 4 , 2 ) , ( 6 , 2 ) } { ( 6 , 1 ) , ( 7 , 3 ) , ( 4 , 2 ) , ( 6 , 2 ) } B { ( 1 , 3 ) , ( 2 , 4 ) , ( − 1 , − 3 ) , ( − 2 , − 4 ) } { ( 1 , 3 ) , ( 2 , 4 ) , ( − 1 , − 3 ) , ( − 2 , − 4 ) } C { ( 8 , 1 ) , ( 7 , 0 ) , ( 7 , − 1 ) , ( 8 , 2 ) } { ( 8 , 1 ) , ( 7 , 0 ) , ( 7 , − 1 ) , ( 8 , 2 ) } D { ( − 2 , 4 ) , ( − 2 , 3 ) , ( − 2 , 2 ) , ( − 2 , 1 ) } Please answer fast

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

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step-by-step explanation:

for the free

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answer: 1+1

step-by-step explanation: 1+1 is at least 2