Algebra 1 Crossword Puzzle

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Across
  1. 1. To reduce a mathematical expression to its lowest or cleanest form.
  2. 3. A letter used to represent an unknown number.
  3. 6. A fixed number that never changes value.
  4. 7. The number multiplied by a variable.
  5. 9. A single number, variable, or product separated by plus or minus signs.
  6. 10. The set of all possible output or y-values.
  7. 11. An algebraic expression consisting of one or more terms.
  8. 12. A math sentence stating two expressions are equal; contains an equal sign.
  9. 13. The measure of the steepness of a line; rise over run.
  10. 14. The set of all possible input or x-values.
Down
  1. 2. A relation where every input has exactly one output.
  2. 4. Terms with the exact same variables and exponents.
  3. 5. A math phrase with numbers, variables, and operations, but no equal sign.
  4. 8. To plug numbers in for variables and simplify.
  5. 12. The small, raised number indicating how many times a base multiplies itself.