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y = m squared

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by MartyMurray » Sat Mar 12, 2016 5:27 am
The exponent should be considered first. So what you really have is y = -(m²)

So because m² cannot be negative, then, except in one case, y is negative. The one exception is the case in which m = 0.

If m = 0 then y = 0

I - Not true if m = 0.

II - Not necessarily the case. Any value of m will work.

III - If m is not 0, then y is negative. So this must be true.

The correct answer is C.
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