1. Chapter 8 Vocabulary A relation is a pairing of numbers in one set, called the domain, with numbers in another set, called the range. 2. The vertical line test says that if you can find a vertical line passing through more than one point of the graph, then the relation is not a function. 3. solution of an equation in x and y is an ordered pair (x, y) A that produces a true statement when the values of x and y are substituted into the equation. 4. An equation whose graph is a line is called a linear 5. The y-coordinate of a point where a graph crosses the y-axis is a y-intercept. 6. Each number in the domain is an input 7. The x-coordinate of a point where a graph crosses the x-axis is an xintercept . 8. A linear inequality sentence with <, >, ≤, ≥. in two variables is a mathematical 9. Each number in the range is an output 10. A relation is a output. function equation . . . if for each input there is exactly one 11. The slope of a line is the ratio of the line’s vertical change, called the rise, to its horizontal change called the run. 12. A linear equation of the form y = mx + b is said to be in form . slope-intercept 13. A system of linear equation , or simply a linear system, consists of two or more linear equations with the same variables. 14. An equation that is solved for y is in function form .