Algebra practice question

Answer: 0

x − 2y is least when x is least and y is greatest: 2 − 2(1) = 0.

Common wrong answers

If you answered 8

8 is x − 2y at x = 2, y = −3, the least x with the least y, but a smaller y makes −2y larger.

If you answered 11

11 is the greatest value (5 − 2(−3)).

If you answered -4

−4 comes from x = 2 and y = 3, but y is at most 1.

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