Pre-Algebra Ch. 8
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Created by:
carolynp1010 Plus on July 5, 2012
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24 terms
Terms | Definitions |
|---|---|
 Relation | A ______ is a set of ordered pairs |
| Domain | The ______ of a relation is the set of all inputs |
| Range | The _____ of a relation is the set of all outputs |
| Input | Each number in a domain |
| Output | Each number in a range |
| Function | A _____ is a relation with the property that for each input there is exactly one output |
| Vertical line test | The _____ says that if you can find a vertical line passing through more than one point of a graph of a relation, them the relation is not a function. otherwise, the relation is a function |
| Equation in two variables | An equation that contains two different variables |
| Solution of an equation in two variables | A _____ in x and y is an ordered pair (x, y) that produces a true statement when the values of x and y are substituted into the equation |
| Graph of an equation in two variables | The ______ is the set of points in a coordinate plane that represent all the solutions of the equation |
| Linear equation | An equation whose graph is a line |
| Function form | An equation solved for y |
| x-intercept | The x-coordinate of a point where a graph crosses the x-axis |
| y-intercept | The y-coordinate of a point where a graph crosses the y-axis |
| Slope | The ratio of the line's vertical change to its horizontal change |
| Rise | The line's vertical change between two points |
| Run | A line's horizontal change between two points |
| Best-fitting line | The line that lies as close as possible to the points in a data set |
| Function notation | An equation written in _____ uses f(x) to represent the output of the function f for an input of x |
| System of linear equations | It consists of two or more linear equations with the same variables |
| Solution of a linear system | A _____ in two variables is an ordered pair that is a solution of each equation in the system. |
| Linear inequality | A _____ in two variables is the result of replacing the equal sign in a linear equation with <, ≤, >, ≥. |
| Solution of a linear inequality | It is an ordered pair (x, y) that makes the inequality true when the values of x and y are substituted into the inequality |
| Graph of a linear inequality | The _____ in two variables is the set of points in a coordinate plane that represent the inequality's solutions |
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