algebra crossword

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Across
  1. 4. can be positive, negative, zero, or undefined
  2. 6. can look like: y>mx+b
  3. 8. a horizontal line on a graph
  4. 9. (0,__)
  5. 12. when a parabola opens down
  6. 15. The _________ formula is f(x)=x^2
  7. 17. y=mx+b
  8. 19. A line that goes up
  9. 20. an invisible line that an exponential can not pass
Down
  1. 1. a line that goes down
  2. 2. Ax+by=c
  3. 3. A vertical line on a graph
  4. 5. represented by the y axis
  5. 7. A U-shaped plot on a graph
  6. 10. The line that divides a parabola in half
  7. 11. (x+y)(x-y)
  8. 13. when a parabola opens up
  9. 14. (__,0)
  10. 16. represented by the x axis
  11. 18. represented by the minimum or maximum