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Is the following relation a function? I think it is, am I wrong?
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Is the following relation a function? I think it is, am I wrong?

Is the following relation a function? I think it is, am I wrong?-example-1
User Youness
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Yes it is. You know about the vertical line test? Draw vertical lines (mentally) and see if you can draw a vertical line that crosses the graph at more than one point. If you can, it isn't a function. In this case (sin(x/4)) is a function.

User Amit Golhar
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