Math is fun!

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