ACT Word of the Week ~ Year 1 Part 1

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Across
  1. 2. A two-dimensional plane formed by the intersection of two lines
  2. 3. To substitute a given number for each variable, and then simplify.
  3. 5. A relation in which each element of the domain corresponds with exactly one element in the range.
  4. 6. An algebraic expression of the sum or difference of two terms.
  5. 7. A number that shows repeated multiplication.
Down
  1. 1. The set of all inputs, or x-coordinates, of the ordered pairs.
  2. 2. The numerical value attached to a term in an expression or equation.
  3. 4. A number that has no fractions or decimals. The set includes zero, the natural numbers and their additive inverses (negative numbers)