Algebra puzzle

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Across
  1. 2. A polynomial with exactly two terms.
  2. 4. The relationship between two sets of data, showing how they change together.
  3. 5. The distance of a number from zero on a number line.
  4. 7. A mathematical term that refers to a quantity that does not change.
  5. 8. The highest exponent of a term in a polynomial equation.
Down
  1. 1. The lowest part or foundation of a geometric figure.
  2. 3. A type of equation where the highest exponent of the variable is one.
  3. 6. A mathematical statement that expresses the equality of two expressions.