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Is q(x)=-8x-21 a function ? Yes or no and why ?

Is q(x)=-8x-21 a function ? Yes or no and why ?
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Is
q(x)=-8x-21 a function ? Yes or no and why ?

User Hijarian
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4 votes
It is a function due to that for every x value, there is only one q(x) value (and vice versa)
User Valentin Briand
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