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if the input value is negative, is the output value of f(z)=-4z+12 always positive or always negative?
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if the input value is negative, is the output value of f(z)=-4z+12 always positive or always negative?

User DalyaG
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If the input value is negative, the output value is always positive. We know this because the negative sign before the 4z will always reverse the negativity of the number that is plugged in.
User Nareesa
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