Pre-Algebra

5-5 Coordinate Geometry 6/1/2010 Slope #27

Today’s Plan:-Intro to slope video-Slope practice

LT: I will identify the slope of a line.

LT: I will identify the slope of a line.

Entry Task:What is the slope of a line? What did you learn about slope in Science?

*TURN IN TEXTBOOKS

Pre-Algebra

5-5 Coordinate Geometry

Slope is a number that describes how steep a line is.

Pre-Algebra

5-5 Coordinate Geometry 6/1/2010 Slope #27

Today’s Plan:-Intro to slope video-Slope practice

LT: I will identify the slope of a line.

LT: I will identify the slope of a line.

Video

Pre-Algebra

5-5 Coordinate Geometry

The slope of a horizontal line is 0. The slope of a vertical line is undefined.

slope = vertical change horizontal change = rise

run

slope = rise run

Pre-Algebra

5-5 Coordinate Geometry 6/1/2010 Slope #27

Today’s Plan:-Intro to slope video-Slope practice

LT: I will identify the slope of a line.

Slope is a number that describes how steep a line is. slope = rise

run

++

--

00

Undefined

Pre-Algebra

5-5 Coordinate GeometryAdditional Example 1A: Finding the Slope of a Line

Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line.

A. XYpositive slope;slope of XY = =

–5–4

54

Pre-Algebra

5-5 Coordinate Geometry

Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line.

B. ZAnegative slope;slope of ZA = = ––1

2 12

Additional Example 1B: Finding the Slope of a Line

Pre-Algebra

5-5 Coordinate Geometry

Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line.

C. BCslope of BC is undefined

Additional Example 1C: Finding the Slope of a Line

Pre-Algebra

5-5 Coordinate Geometry

Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line.

D. DMslope of DM = 0

Additional Example 1D: Finding the Slope of a Line

Pre-Algebra

5-5 Coordinate Geometry

Try This: Example 1ADetermine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line.

A. AB A

C

B

D

FE

HG

positive slope;slope of AB = 1

8

Pre-Algebra

5-5 Coordinate Geometry

B. CDslope of CD is undefined

Try This: Example 1BDetermine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line.

A

C

B

D

FE

HG

Pre-Algebra

5-5 Coordinate Geometry

C. EFslope of EF = 0

Try This: Example 1CDetermine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line.

A

C

B

D

FE

HG

Pre-Algebra

5-5 Coordinate Geometry

D. GH

Try This: Example 1DDetermine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line.

A

C

B

D

FE

HG

negative slope;slope of GH = = ––1

3 13