Coordinate Geometry

Entry diagnostic

Choose one answer and explain why. Each question has one choice mark and one explanation mark. Explanations are saved in this browser and require review.

How to enter an exact answer

Use sqrt(5), 3/2 and x^2. For roots: -7, 4. For intervals: (-inf,2] U (5,inf), or 2 < x < 5. For no solutions: empty. For pairs: (1,3); (3,-1). Keep each pair together. For a formula, enter the expression only, such as (3*x+1)/(x-2). Use cbrt(x+8) for a real cube root and pi for π. A line needs a complete equation, for example 3*x+4*y=20; vertical lines such as x=3 are valid. Separate multiple equations with a semicolon. For coordinate maps, use the variables named in the label.

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