Algebra crossword

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Across
  1. 5. the non-negative value of x without regard to its sign.
  2. 8. two lines that never intersect with the same slope
  3. 9. the difference between consecutive terms is always the same
  4. 11. estimates a straight line that minimizes the distance between itself and where observations fall in some data set
  5. 12. the point where the line intersects the y-axis.
  6. 13. those whose graph is a straight line
Down
  1. 1. a measure of relationship between two variables.
  2. 2. the difference between consecutive numbers in an arithematic sequence
  3. 3. y= mx + b
  4. 4. a process that manipulates a polygon or other two-dimensional object on a plane or coordinate
  5. 6. perpendicular lines are defined as two lines that meet or intersect each other at right angles
  6. 7. rise over run
  7. 10. identifies a possible relationship between changes observed in two different sets of variables.