Types of function (Mathematics)

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Across
  1. 1. Function defined by f(x) = |x|
  2. 7. Function which maps two or more elements
  3. 9. Every element is mapped to itself
  4. 10. function defined by f(x) = [x]
Down
  1. 2. one element map to one element only
  2. 3. Every element has pre image
  3. 4. Every element is mapped to one number only
  4. 5. function which represented by a rational fraction
  5. 6. f(x)={1,ifx > 0;0,if x =0;-1,if x<0
  6. 8. one element map to one element only