# Chapter 8 Notes

## 28 terms

### Relation

A ______ is a set of ordered pairs.

### Domain

The ______ of a relation is the set of first co-ordinates.

### Range

The ______ of a relation is the set of second co-ordinates.

### Function, domain, range

A ______ is a relation in which earch element of the ______ is paired with only one element of the ______.

### Scatter Plot

A ______ ______ displays a group of points that correspond to a relation.

### Positive

If the points appear to slant upward to the right, there is a ______ relationship.

### Negative

If the points appear to slant downward to the right, there is a ______ relationship.

### No

If the points appear to have a random distribution there is ______ relationship.

### mx+b

A linear equation is often written in the form y=______.

### infanant

An equation with two variables has an ______ number of solutions.

### Functional

Equations that represent functions can be written in ______ notation, f(x).

### Range

The symbol f(x) represents the value in the ______ that corresponds to the value of x in the domain.

### Graph

A ______ is a visual representation of an equation.

### Y2 -Y1 over X2 - X1

The slope of a non vertical line passing through the points x1, y1 and x2 and y2 is ______.

### Rise

The numerator is called the ______.

### Run

The denominator is called the ______.

### Positive

A line with a ______ slope rises from left to right.

### Negative

A line with a ______ slope falls from left to right.

### Horizontal

A line with slope 0 is ______.

### Vertical

The slope of a ______ line is undefined.

### Parallel

Lines that have the same slope are ______.

### X intercept

The ____________ is the value of x when y = 0.

### Y intercept

The ____________ is the value of y when x = 0.

### Solution

A ______ to a system of equations i the ordered pair that is a solution to each equation.

### Solve

To ______ a system of equations by graphing, graph each equation and identify the intersection.

### Slope intercept

To graph a linear inequality with two variables write the corresponding linear equation in ______ ______ form.

### boundary

The graph of the corresponding linear equation is the boundary of the linear inequality.

### true

The solution of a linear inequality in two variables is any ordered pair for which the inequality is ______.