**From your syllabus:**

"Chapter Tests are worth 10 points each and will be

administered at the beginning of class on scheduled dates.

There are no makeup

Tests available. Tests will consist of a

maximum of five problems similar to those in the Chapter

Test in the book."

Y**ou have ten minutes to**

complete the test.

Have fun & Good Luck!

## Schedule for today

· Stamp, Grade Homework

· Chapter 2 Test

**· Graphs: reading, scaling, points**

· Graphing linear equations

## Vocabulary

**Bar Graphs:** used to show differing amounts
( comparisons )

** Circle Graphs (or Pie Chart ):** used to show the
relationship of

different parts of a whole (percents)

**Line Graphs: **used to show how amounts change

**Cartesian Coordinate System : **a standard method of
location points

on a plane that is cut by a horizontal axis and vertical axis. (Also

known as the **Rectangular Coordinate System**)

**Coordinate: **a number that is associated with a
point on a plane

**Linear Equation: **a firstdegree

polynomial equation in one or more

variables

## Bar, Circle and Line Graphs

**Example 1: **Examine the circle graph below . If the
Brown

family had an income of $35,860 in 2006, how much did they

spend on insurance?

## Bar, Circle and Line Graphs

**Example 2:** Given the line graph below, what is the
approximate

price of a share of Ms. Rivera's stock on October 15th?

## Bar, Circle and Line Graphs

**Example 3:** Review the bar graph below. About how
much rain

fell in Seattle on Monday?

## Plotting Points The-Cartesian Coordinate System

**Recall:** Graphing a the solution of an equation or
inequality :

Suppose we wanted to find the solution to the fol lowing
problem :

**Name two numbers whose sum is 5.**

## Plotting Points The-Cartesian Coordinate System

**The Cartesian Coordinate System**

## Plotting Points The-Cartesian Coordinate System

**Example:** Graph the following ordered pairs of (x,y)

coordinates on the rectangular coordinate system below .

## Plotting Points The-Cartesian Coordinate System

**Practice 1:** Graph the following ordered pairs of (x,y)

coordinates on the rectangular coordinate system below.

## Plotting Points The-Cartesian Coordinate System

**Practice 2:** Find the coordinates of the points A,
B, C, D, E, F,

and G on the rectangular coordinate system below.

## Schedule for today

· Stamp, Grade Homework

· Chapter 2 Test

· Graphs: reading, scaling, points

**· Graphing linear equations**

## Graphing Linear Equations

Recall the following problem:

**Name two numbers whose sum is 5.**

## Graphing Linear Equations

**Graphs of Vertical and Horizontal Lines**

**Practice:**

**Practice:**

**Recall**

**Recall:** A vertical line is represented by the
equation x = k,

where k is the value of the x-coordinate

of any point on the line.

**Recall:** A horizontal line is represented by the
equation y = k,

where k is the value of the y-coordinate

of any point on the line.

**Check for understanding:** Write the equation of each
line.

**Vocabulary**

**Slope- intercept form of a line:** the equation of any
line that is

not vertical can be written in this form. y = mx + b

**y-intercept:** the point where the graph

crosses the y-axis.

It is the y-value when x = 0. (In the slope-intercept

form of a line, b is the y-intercept.)

**x-intercept:** the point where the graph

crosses the x-axis.

It is the x-value

when y = 0

**Graphing Lines**

**Example 1:** Graph using intercepts. y = -3x + 6

**Example 2:** Graph using intercepts. 3x - 2y = 60

**Practice:** Graph using intercepts. y = 2x - 5

**Slope**

Recall: The slope-intercept

form of a line: y = mx + b

The m is the slope of the line

**Slope:** The ratio of the rise to the run of a line.

**Example 2:** Find the slope of the line.

**Example 2: **Find the slope of the line.

**Practice 1:**

1) Find the slope of the line.

2) Find the y-intercept
of the line.

3) Write the equation of the line.

**Practice 2:**

1) Find the slope of the line.

2) Find the y-intercept
of the line.

3) Write the equation of the line.

**Have a great day!**

**Homework #7 on**

MathXL

•Blank Word Document.doc

•GraphsHowto.doc

•7.StudentNotes.pdf