The Tools of Algebra

2. A set of ordered pairs that shows how two values are connected.
3. pair, Two numbers written in parentheses that tell you where a point is located, such as (3, 2).
5. All the y-values in a relation.
7. The value that makes an equation true.
10. expression, A math phrase that contains numbers, operations, and at least one variable.
11. The horizontal number line on a coordinate plane.
13. of operations, The rules that tell you which math steps to do first.
14. A drawing that shows points, numbers, or information.
16. plane, A grid made by two number lines that cross at right angles.
18. To find the value of a math expression.

1. Rules that explain how numbers and operations work.
4. A letter or symbol that stands for a number.
6. All the x-values in a relation.
8. plot, A graph that uses separate dots to show how two sets of numbers are related.
9. The vertical number line on a coordinate plane.
12. To make an expression shorter or easier to work with without changing its value.
15. expression, A math phrase made of numbers and operation signs, but no equal sign.
17. A math sentence that has an equal sign.