Math is fun!

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Across
  1. 2. the set of positive and negative whole numbers, and zero
  2. 4. the bottom number in a fraction (divisor)
  3. 6. any equation that can be written in standard form Ax+By=C
  4. 8. a quantity that can change or that may take on different values
  5. 11. counting numbers
  6. 14. the mathematics of working with variables
  7. 15. a circle with a radius of 1 and is centered at the origin
  8. 16. the set of values of the independent variables for which a function is defined
  9. 17. a mathematical sentence built from expressions using 1 or more equal signs
  10. 18. a transformation in which a figure grows longer
  11. 21. transformation moving every point the same distance and direction; slide
  12. 22. numbers that cannot be written as fractions
  13. 29. lines in the same plane having no points in common
  14. 30. another word for average
Down
  1. 1. a function whose graph forms a straight line
  2. 3. the set of values of the dependent variables for which a function is defined
  3. 5. lines that intercept to form right angles
  4. 7. the study in mathematics involving cosine, sine, tangent, secant, cosecant, and cotangent functions of angle measures on a unit circle
  5. 9. the distance between the number and the origin
  6. 10. how long it takes before a function repeats itself
  7. 12. a change in position or size of a figure
  8. 13. a unit of angle measure using pi (π) instead of degrees; the angle measure is found by multiplying the degrees by π/180
  9. 19. line on a graph that a function nearly touches but doesn't ever quite meet
  10. 20. numbers that can be written as fractions
  11. 23. the multiplicative inverse of a number
  12. 24. the point of intersection of the x- and y-axes
  13. 25. the top number in a fraction (dividend)
  14. 26. the point halfway between two given points
  15. 27. a transformation across a line that produces a mirror image; a flip
  16. 28. counting numbers and zero