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Mathematics 21 Online
OpenStudy (anonymous):

Please answer http://i57.tinypic.com/cuxax.jpg

OpenStudy (goldphenoix):

What's the y-intercept?

OpenStudy (anonymous):

Im pretty sure its 2.

OpenStudy (goldphenoix):

Yup. Therefore it's not A. You know the slope of it?

OpenStudy (anonymous):

Im pretty sure 2/4

OpenStudy (anonymous):

But i thought about it, and you can reduce 2/4 to 1/2

OpenStudy (goldphenoix):

Close, but the line is going down, not up. :)

OpenStudy (goldphenoix):

So it's -1/2. Therefore C cannot be the answer. You're now stuck with B and D. Next, you want to test. If the origin or (0,0) is shaded, then go test it. ^^ Let's try B \[\large \large (0) \le-\frac{ 1 }{ 2 }(0) + 2\]

OpenStudy (anonymous):

Ohh.

OpenStudy (goldphenoix):

So what do ya get? :)

OpenStudy (anonymous):

0 is greater but equal 2?

OpenStudy (goldphenoix):

Hmm. Not greater than or equal.

OpenStudy (anonymous):

Less than woops :l

OpenStudy (anonymous):

Less that equal to?

OpenStudy (goldphenoix):

Yep. Now think about it. Is 0 less than or equal to 2? If it's true, then it's B. If it's not, it's D. So what's the answer? ^_^

OpenStudy (anonymous):

0 is less, but isnt equal to 2.

OpenStudy (goldphenoix):

Good job! Therefore, the answer is B. :D

OpenStudy (anonymous):

Thank you!

OpenStudy (goldphenoix):

No problem! :)

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