Steven M.

asked • 02/23/15

What is the function?

Took a pretest and this one stumped me. Any help would be greatful

3 Answers By Expert Tutors


Mark M. answered • 02/23/15

5.0 (243)

Mathematics Teacher - NCLB Highly Qualified

Mark M.

I overworked this problem.
For a relation to be a function, no input (x-value) may be repeated, i.e., have two or more outputs (y-value).
Since 3, 6, 7, and 9 have been used as inputs, select either 8 or 12 for the x-value. What value is picked for the y-value does not matter.


Mark M.

Repetition of the input, the x-value, negates a relation from being a function. Repetition of the output, the v-value, has no relation to being a function. 


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