# Chapter 2

### 21 terms by rce423

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### Absolute Value Function

a function of the form f(x)=|mx+b|+c where m=/0

### Constant of Variation

When x and y are variables you can write k=y/x so the ratio y:x equals the constant k

### Dependent Variable

When the value of Y depends on the value of X;Y

### Direct Variation

A linear function defined by an equation of the form y=kx where k=/ 0; as with any line the slope k is constant

### Domain

The set of all inputs or x-coordinates of the ordered pairs

### Function

A relation in which each element of the domain is paired with exactly one element in the range

### Independent Variable

When the value of Y depends on the value of X;X

### Linear Equation

A way to represent a linear function

### Linear Function

A function whose graph is a line

### Linear Inequality

an inequality in teo variables whose graph is a region of the coordinate plane that is bounded by a line

### Parent Function

The simplest function with these characteristics y=|x|

### Point-Slope Form

The line through point (x1,y1) with slope m: y-y1=m(x-x1)

### Range

The set of all outs or y-coordinates of the ordered pairs

### Relation

A set of pairs of input and output values

### Slope

The ratio of vertical change to a corresponding horizontal change

y=mx+b

Ax+By=C

### Translation

Shifts the graph horizontally, vertically, or both

### Vertical-Line Test

A way to tell whether the relation is a function on a graph of a relation

### X-Intercept

The point at which the line crosses the x-axis

### Y-Intercept

The point at which the line crosses the y-axis

Example: