Michigan State University - Diagnostic Exam

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6.3

  •   A point on the circle of radius 2, centered at the origin has an x-coordinate of 1. The y-coordinate is (?)

    a) √ -- 3 b) 1 c) ±√ -- 3 d) ±1 e) ±√ -- 2

Solution:

√ -- ⇒12+ y2 = 22 ⇒ y = ± 3

Diagnostic:

See 5.1: Conic Sections (Circles) and 2.1: Equations (Quadratic) .

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July 15, 2008