chapter 3 vocabulary

4. any number that can be written as a ratio of a over b where a and b are integers and b does not equal 0
7. the point where the two axes of a coordinate plane intersect (0,0)
10. any integer less than zero
12. a pair of numbers used to locate a point on a grid
13. a plane formed by a horizontal line called the x-axis and a vertical line called the y-axis
14. any integer greater than zero
16. a line that divides a figure into two halves that are reflections of each other

1. the distance of an integer from zero on a number line
2. the second number in an ordered pair
3. a figure has line symmetry if it can be folded about a line so that its two parts match exactly
5. the first number in an ordered pair
6. the horizontal number line on a coordinate plane
8. the four regions of the coordinate plane separated by the x- and y-axes
9. the vertical number line on a coordinate plane
11. two numbers are the same distance but in opposite directions, from zero on a number line
15. the set of whole numbers and their opposites