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Across 1. A line that acts as a mirror so that the corresponding points are the same distance from the mirror 5. when data in a set are arranged in order, these split the data into quarters 6. an equation that states two ratios are equal 8. The set of all natural numbers and zero 10. The set of numbers greater than zero 12. The set of numbers less than zero 14. The entire group of objects or individuals considered for a survey 15. A measured characteristic of a sample 16. A bisector divides a segment or angle into two equal parts 18. a + b + c = b + c + a 19. The movement of all of the points of a figure in a plane according to a common operation 20. a value that is very far away from most of the values in a data set 21. a number that can be written as a/b where a and b are integers and b canno equal 0 22. a selected part of a population 25. a + (b + c) = (a + b) + c 27. the distance between a number and 0 on a number line 29. the set of whole numbers and their opposites 30. a (b + c) = ab + ac

Down 1. A transformation that "flips" a figure over a line of reflection 2. Two different numbers that have the same absolute value 3. Collection of data from every member of a population 4. Counting Numbers 7. A mathematical sentence that contains an equal sign 9. the difference between the first and third quartiles 11. a mathematical phrase involving at least one variable and sometimes numbers and operation symbols 13. A transformation that "slides" each point of a figure the same distance in the same direction 17. A transformation that turns a figure about a fixed point through a given angle and a given direction 23. a measured characteristic of a population 24. a symbol that represents a number 26. a comparison of two quantities taht share a fixed, multiplicative relationship 28. A symbol that indicates whether a number is positive or negative