Which of the following relations is not a function? a. {(7, 8), (8, 9), (9, 10), (7, 6)} b. {(7, 8), (8, 9), (9, 10), (10, 11)} c. {(7, 8), (8, 9), (9, 8), (10, 9)} d. {(7, 8), (8, 8), (9, 8), (10, 8)} pls

A.{(7, 8), (8, 9), (9, 10), (7, 6)}

Step-by-step explanation:

when graphing do the straight line test on the x axis with a pencil or something and if the pencil touches more than one dot than it is not a function.

another way is to just look at the numbers for the x axis and if any of the numbers are the same for example (4,6), (4,9) then it is not a function. an example of a function would be (8,9), (2,6).

they disappear if your absent from to long. i found out that the hard way.

step-by-step explanation:

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