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Mathematics 15 Online
OpenStudy (pixiedust1):

=

OpenStudy (pixiedust1):

@skullpatrol

OpenStudy (anonymous):

f(x)=x

OpenStudy (schrodingers_cat):

One is line function. However three is a absolute value function so you may be inclined to justify it as a line however at x = o the function is acute and therefore is probably not considered a line. IxI does fail the test for a linear function I.E. it must satisfy f(ax+y)=af(x)+f(y) which it does not so its not a linear function. Hope this helps :)

OpenStudy (anonymous):

don't you get it?

OpenStudy (pixiedust1):

@OOOPS Don't I get what?

OpenStudy (anonymous):

I didn't see you replied or said anything to the helpers. Just make sure whether you get it or not or need more explanation.

OpenStudy (pixiedust1):

I'm sorry. I was waiting for some responses, and moved on to do other things. And no, I'm still not understanding it

OpenStudy (pixiedust1):

@OOOPS

OpenStudy (anonymous):

the standard form of a line is y = mx + b where m is slope of the line, b is y intercept. among the choices, only f(x) = x has that form where m =1 and b =0. Therefore, the choice is f(x) =x to f(x) = |x|, it's a special case whose graph is not a line. So, reject it to f(x)= x^2, you know its graph is a parabola, not a line. Is it clear?

OpenStudy (pixiedust1):

Thanks

OpenStudy (anonymous):

np

OpenStudy (pixiedust1):

HELP STILL NOT UNDERSTANDING

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