# Algebra 2 Final Vocabulary Chapters 1-3

## 21 terms

### Compound Inequality

A pair of inequalities combined by the words and or or

### Correlation Coefficient

A number represented by the variable r, where -1≤r≤1, that describes how closely points in a scatter plot cluster around the least-squares line

### Direct Variation

The equation y=kx describes a direct variation, where y varies directly as x, k is the constant of variation, and k≠0

### Literal Equation

An equation that contains two or more variables

### Simplified Expression/Function

An expression/function that has had all like terms combined and all the parentheses have been removed

y=mx+b

### Standard Form

Ax+By=C, where A and B are not both 0

### X-Intercept

The x-coordinate of the point where the graph crosses the x-axis

### Y-Intercept

The y-coordinate of the point where the graph of a line crosses the y-axis

### Dependent Variable

The output of a function

### Independent Variable

The input of a function

### Domain

The set of possible values for the first coordinate of a function

### Range

The set of possible values for the second coordinate of a function

### Rational Numbers

Numbers that can be expressed as the quotient of two integers, where the denominator is not equal to zero

### Irrational Numbers

Numbers whose decimal part does not terminate or repeat

### Relation

Any set of ordered pairs

### Function

A relation in which, for each first coordinate, there is exactly one corresponding second coordinate

### Vertical-Line Test

If a vertical line crosses the graph of a relation in more than one point, the relation is not a function

### Consistent System

A system of equations or inequalities that has at least one solution

### Inconsistent System

A system of equations or inequalities that has no solution

### System of Equations

A set of equations in the same variables