SOLUTION: Explain why a linear inequality cannot be a function
Algebra.Com
Question 1005852: Explain why a linear inequality cannot be a function
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Region of a plane instead of just points on a curve means that each input can have more than one "output", so not a function. Another way to describe this is that the inequality will fail the "vertical line test".
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