click below
click below
Normal Size Small Size show me how
Algebra
Algebra Vocabulary
Term | Definition |
---|---|
Variable | A symbol that represents a quantity that can vary. |
Constant | A symbol that represents a specific number (a quantity that does not vary). |
Counting Numbers | Natural numbers such as 1, 2, 3, 4, 5 ... |
Integers | Includes counter numbers and other number such as ..., -3, -2, -1, 0, 1, 2, 3, ... |
Rational Numbers | Numbers that can be written in the form n/d where n and d are integers and d is not zero |
Real Numbers | All the numbers represented on the number line |
Irrational Numbers | The real numbers that are not rational. |
Average or Mean | To find, divide the sum of the numbers by the number of numbers in the group. |
Negative Numbers | Real numbers less than 0 |
Positive Numbers | Real numbers greater than 0 |
Scattergram | A graph of plotted ordered pairs. |
Independent Variable | The x axis of a scattergram; happens first |
Dependent Variable | The y axis of a scattergram, happens second |
Linearly related | If two quantities of an authentic situation are described accurately by a line. |
Model | A mathematical description of an authentic situation. |
Linear Model | A non-vertical line that describes the relationship between two quantities in an authentic situation. |
Input | A permitted value of the independent variable that leads to at least one output. |
Output | A permitted value of the dependent variable |
Intercepts of a Line | Any point where a line and an axis of a coordinate system intersect. |
Expression | A constant, variable, or a combination of constants, variables, operation symbols, and grouping symbols, such as parenthesis. |
Evaluate an Expression | We evaluate by substituting a number for each variable in the expressions and then calculating the result. |
Division by Zero | Division by zero is undefined. |
Simplify a Fraction | Reducing a fraction to it's lowest common denominator. |
Simplify Results | If the result of an exercise is a fraction, simplify it. |