# Math Chapter 2 Test

"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."
You have ten minutes to
complete the test.
Have fun & Good Luck!

## Schedule for today

· Chapter 2 Test
· 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 following 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

· Chapter 2 Test
· 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

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