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Posted Thu Apr 28 16:24:27 PDT 2005 by Ashley Crippen (aecrippen@rmwc.edu).

Randolph-Macon Woman's College, Lynchburg, USA

Materials Required: handouts with pictures of slopes, worksheets, wooden triangle, trasparency, overhead, calculators

Activity Time: 30 minutes

Concepts Taught: finding the slope, describing the slope, determining the slope given an equation, graphing

Subject: Math (specifically slopes of lines)Goals: The student will understand how to determine the slope of a line when given an equation of a line or the graph of a line.

Rationale: To provide exposure to real life experiences that utilize math concepts.

Objectives: TSWBAT

• Find the slope of a line

• Describe the slope as positive or negative

• Determine the slope given an equation in slope intercept form

• Graph a line with a given slopeStandards: SOL A.7

Ability Levels: 9th grade students or varying abilities

Set/Introduction:

• What comes to your mind when you think of the word “slope”?

Where do you see slopes in the real world?

-Jot down ideas on the board.

• Pass out pictures of slopes to each student.

• Have students come to the board and plot the line of their picture using an estimate of points located on the line.Procedures:

• So what exactly does slope mean in mathematical terms?

• Positive vs. negative slopes

-how to determine whether a slope is positive or negative

• Determining the slope:

Given a graph.

-use two examples already on the board

*hands-on example on overhead.

ask for volunteer to plot points.

Given an equation:

-slope-intercept form

-one teacher-led example, one student-led example

-general equation

-one teacher-led example, one student-led example

• Pass out worksheet for practice on determining slope from graphs and equations

• Ask for volunteers to do problems 1-3.

• Pass out graph paper for practice on graphing slope.Time Required: 30 minutes

Materials:

• Handouts with pictures

• Worksheets

• Wooden triangle, transparency, overhead projector

• Calculators?Activity:

• Graphing the lines/slopes of the pictures on the board

• Practice worksheetGuided Practice:

• Examples done on the board

-What is slope?

-Positive vs. negative

-Determining slope using a graph or equation

-slope-intercept form/general formTechnology:

• Overhead projector

• Computer/Internet

• CalculatorsHomework:

• Completion of worksheetAssessment/Evaluation:

• Personal observations

• Completion of worksheet

• Ability to graph on board