Solving System Of Equations By Graphing Lesson Plan for 8th Grade Students

Topic: Solving System of Equations by Graphing

Objectives & Outcomes

Materials

• Graph paper
• Pencils
• Erasers

Warm-up

• Ask students if they have ever solved a system of equations by graphing.
• Ask them to give an example of a system of equations they have solved by graphing.
• Ask them to explain how they solved the system of equations.

Direct Instruction

• Explain that we can use graphing to solve system of equations by finding the x-intercepts of the graphs of the equations and then finding where the graphs intersect.
• Show students an example of graphing 2 equations and using the x-intercepts to find the solution.
• Explain that we can also use graphing to solve system of equations by using the substitution method.
• Show students an example of graphing 2 equations and using the substitution method to find the solution.

Guided Practice

• Give students a set of equations to graph on the same coordinate plane.
• Have students identify the x-intercepts of each graph and explain how they determined the x-intercepts.
• Have students use the substitution method to solve the system of equations and explain their process.

Independent Practice

• Have students work in groups to solve a system of equations using the elimination method.
• Have each group present their solution to the class and explain their process.

Closure

• Review the steps for solving a system of equations using the elimination method.
• Ask students if they have any questions about the lesson.

Assessment

• Students will be assessed on their ability to solve a system of equations by graphing.
• Evaluation will be based on the accuracy and completeness of their solutions.
• Students will be given a quiz or test covering the material from today's lesson.