Algebra Crossword Puzzle

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Across
  1. 4. A grid with x and y axes
  2. 6. The answer to a multiplication problem
  3. 7. Two lines that never meet
  4. 11. An equation that shows two ratios are equal
  5. 13. A number that divides evenly into another
  6. 15. A number on its own
  7. 17. The number that makes an equation true
  8. 19. How many times the base is used
Down
  1. 1. Two expressions set equal to each other
  2. 2. A number made by multiplying a number by itself
  3. 3. The steepness of a line
  4. 4. The number in front of a variable
  5. 5. A math sentence with an equals sign
  6. 8. The opposite of a number
  7. 9. A math sentence without an equals sign
  8. 10. A letter that stands for a number
  9. 12. The point (0,0) on a graph
  10. 14. A number that is multiplied repeatedly
  11. 16. A value you get from a function
  12. 18. A value you put into a function