Linear FUN!

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Across
  1. 4. a letter that represents an unknown number
  2. 6. has a constant rate of change but NOT a constant of proportionality
  3. 7. the number being added or subtracted in a nonproportional equation
  4. 8. when a negative number and a positive number cancel each other out
  5. 9. all graphs that have a constant rate of change are.....
  6. 10. another word for the coefficient in a proportional relationship
Down
  1. 1. when y/x is the same for every row
  2. 2. the change in y divided by the change in x
  3. 3. to reduce a fraction or expression
  4. 5. the solution for "y" when "x=1" is called....