Basic Calcu-Puzzle!

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Across
  1. 3. / The complete set of possible values of the independent variable.
  2. 6. / A relation from a set of inputs to a set of possible outputs where each input is related to exactly one output.
  3. 9. / concept describing something without any bound, or something larger than any natural number.
  4. 10. Theorem /Also known as the pinching, or sandwich theorem.
Down
  1. 1. / The graph of a function can be traced with a pen without lifting the pen from the paper.
  2. 2. / when the denominator of a function is zero.
  3. 4. / tells us the value that a function approaches as that function's inputs get closer and closer to some number.
  4. 5. / ∞/a=?
  5. 7. Calculus / A branch of mathematics which helps us understand changes between values that are related by a function.
  6. 8. / a/∞=?