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Can you identify this line graph? 
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#1
Feb1114, 07:59 PM

#2
Feb1114, 09:16 PM

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If we consider the number line to be an x axis, then the ray drawn is ##x\geq 0##.
This does not correspond to any of the options below. Could it be that you are asked which if the relations best fits the numberline? i.e. a ray drawn ##x\geq 0## could be consistent with ##y=\sqrt{x}##. Which would mean it is an exercise in your understanding of the domains of functions. Pluggig in values is one approach but you are better to use your understanding of the way the functions behave ... i.e. does the equation have an assymptote or go undefined anywhere? 


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