Question

Determine whether the relation is a function. http://curriculum.kcdistancelearning.com/courses/ALG1x-HS-A06/a/exams/4-EXAM4/mapping_50.gif

Answer 1

@blondie16

Answer 2

well do you know what the vlt is?

Answer 3

no

Answer 4

Mikaela, the only rule of a function is that each input must have only one output. If there is any input that has 2 outputs, then we say that it is not a function.

Answer 5

put those points on a graph

Answer 6

That's more work than you need to do. If the vertical line test is the ONLY way that you can understand what a function is, then sure, I guess you should plot the points. It's not really necessary though.

Answer 7

ok well if you have more than 1 of the same x value it is not a function right?

Answer 8

oh okay

Answer 9

Think of it in terms of inputs and outputs. A function takes in inputs, and it gives out outputs. If I put in an input (an x value) what comes out should be exactly 1 y value. If more than one y value comes out, that's a problem.

Answer 10

This map shows that if I put in 6, the output is -5.

Answer 11

If I put in 3, the output is 2.

Answer 12

If I put in 2, the output is 6 and 7.

Answer 13

so its a function?

Answer 14

Are you reading my explanation and trying to understand, or are you hoping that I'll tell you the answer?

Answer 15

no im reading your explantion

Answer 16

Re-read it.