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Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
The four different parts of a coordinate plane.   Quadrants  
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The set of all rational and irrational numbers.   Real Numbers  
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Each number in a set.   Element  
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The first number in an ordered pair.   x-coordinate  
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A set of ordered pairs.   Relation  
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The point of intersection of the two axes in the coordinate plane.   Origin  
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A line with equal distances marked off to represent numbers.   Number Line  
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The integers greater than zero.   Positive integer.  
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Between every pair of distinct rational numbers, there are infinitely many rational numbers.   Density Property  
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A fraction that contains a fraction in its numerator, denominator, or both.   Complex Fraction  
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The symbol used to represent a non-negative square root.   Radical Symbol  
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A line that separates the coordinate plane into half-planes.   Boundary  
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The vertical number line.   y-axis  
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Set of all first coordinates from a relation.   Domain  
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