Identify the linear inequality in TWO variables.
Aax + by ≤ c (where a ≠ 0, b ≠ 0)
Bax² + b ≥ 0
Cax + b < 0
Dax² + bx + c > 0
Answer & Solution
Correct answer: A. ax + by ≤ c (where a ≠ 0, b ≠ 0)
Linear in two variables has form ax + by R c where R is one of <, ≤, >, ≥ and a, b ≠ 0. ax + b is one variable.
The quadratic-in-x examples (ax² + …) are NOT linear.
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