Algebra crossword.

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Across
  1. 7. x value in a function
  2. 8. polynomial equation
  3. 10. a letter that represents a unknown number
  4. 12. a line that u can draw down the middle of a Parabola
Down
  1. 1. two lines that make a 90 degree angle.
  2. 2. to test if there is a function
  3. 3. another name for slope
  4. 4. x' intercept in a parabola
  5. 5. 45 is ___________ 44.9999
  6. 6. two lines that never touch.
  7. 9. y value in a function
  8. 11. (b) in y=mx+b