algebra vocabulary

4. the quarter of the plane on the Cartesian coordinate system.The plane is divided into four sections,each section is called a quadrant
5. point at which the graph of a line crosses the y-axis, point as which x=0
8. collection of numbers,variables, and operations
9. have the same slope, and do not intersect at any point
10. a number that is used to represent one or more variables
13. terms with no variables
16. equation whereby letters represent real numbers and whose graph is a line
17. slopes are opposite reciprocals of each other,intersect each other at right angles
18. the point (0,0)
19. a rule that establishes a relationship between two quantities, called the input and output,for each input there is exactly one output
20. a statement formed with an equal sign is placed between the two expressions

1. the collection of all inputs
2. terms that have the same variable raised to the same power
3. the rules established to evaluate an expression involving more than one operation
6. the collection of all outputs
7. point at which the graph of a line crosses the x-axis,point at which y=0
11. shows the steepness or incline of a line, determined from two points on a line
12. The relation between two quantities.can be expressed in words,fraction,decimals or percents
14. to find the value of each expression by replacing each variable with its value
15. a number multiplied by a variable in a term