What is ya word brotha? (Algebra's version)

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Across
  1. 2. horizontal line on a coordinate grid
  2. 4. sequence rising by a constant percentage
  3. 8. sequence rising by a constant rate
  4. 11. solution on the x-axis
  5. 12. lowest value
  6. 13. difference between the maximum and minimum value
  7. 14. system of equations that has one line
  8. 15. vertical line on the coordinate grid
Down
  1. 1. solving the system of equations by cancelling out terms
  2. 3. number that never ends
  3. 5. how spread out the points are from the mean
  4. 6. average
  5. 7. number that ends
  6. 9. y/x
  7. 10. highest value