Linear Equationz Puzzle

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Across
  1. 5. Any flat line parallel to the x-axis
  2. 6. Continuous dots, looks like a line
  3. 9. A list of all possible y values
  4. 10. What is the slope of a horizontal line?
  5. 11. y1 is the y value, m is the slope, and x1 is the x value.
  6. 16. A table that displays x and y values
  7. 17. Ax+By=C
  8. 18. A visual representation of two or more quantities
  9. 19. A list of all possible x values
  10. 20. A constant product of y times x for all ordered pairs.
  11. 21. The point where a line crosses the x-axis
Down
  1. 1. An expression that defines a relationship between two variables.
  2. 2. Every set of ordered pairs.
  3. 3. Disconnected dots
  4. 4. A relationship between x and y where there is a constant ratio for ordered pairs.
  5. 7. What is the value of a vertical line?
  6. 8. The rise and run of a line
  7. 12. A straight line
  8. 13. Gives y-intercept and slope (y=mx+b)
  9. 14. The point where a line crosses the y-axis
  10. 15. A symbol for an unknown number