Algebra practice question

Answer: 3

Two lines have no common point only when they are parallel and distinct. Parallel means equal slopes: k = 3. The intercepts (1 and −2) differ, so the lines never meet.

Common wrong answers

If you answered 1

1 is the y-intercept of the first line, not its slope.

If you answered -3

−3 gives slopes 3 and −3 — the lines cross once.

If you answered -2

−2 is the y-intercept of the second line.

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