Question

Which of the following relations doesnot represent a function?A {(4,4),(5,4), (6,4)}B {(4,4),(4,5),(4, 6)C {(4,5), (5,5), (6,5)}D {(4,4),(5,5), (6,6)}

Answer 1

The answer would be B, because the number 4 is repeated more than one time in the input which means it would have one input going to several outputs which makes it invalid.

Answer 2

In a set of ordered pairs,

To be considered a function, each x-value must be paired with a corresponding UNIQUE y-value.

We want to select the "relation" from the choices, not the function.

A. Represents a function. Each x value paired with unique y value.

B. Doesn't represent a function. "4" is paired up with mutliple values of y.

C. Represents a function. Each x value paired with unique y value.

D. Represents a function. Each x value paired with unique y value.

AnswerB