Use an algebraic representation to explain the effect of a given positive rational scale factor applied to two-dimensional figures on a coordinate plane with the origin as the Video Lesson

About This Video

Curriculum-aligned Grade 8 Mathematics lesson video for Use an algebraic representation to explain the effect of a given positive rational scale factor applied to two-dimensional figures on a coordinate plane with the origin as the. Use it for classroom preview, instruction support, or home review.

This watch page is dedicated to the video. For the complete text lesson plan, activities, standards alignment, and answer guides, use the companion lesson page: Use an algebraic representation to explain the effect of a given positive rational scale factor applied to two-dimensional figures on a coordinate plane with the origin as the lesson plan.

Video Learning Notes

In this lesson, students learned that dilation with the origin as the center and a positive rational scale factor multiplies the coordinates of points in a figure by that scale factor. This transformation changes the size of the figure while preserving its shape, resulting in a similar figure. Using algebraic expressions like (kx, ky) helps explain and predict the effect of dilation on any point in the coordinate plane.

Learning Goals

• Explain how multiplying the coordinates of points by a positive rational scale factor changes the size of a figure on the coordinate plane with the origin as the center of dilation.
• Use algebraic expressions to represent the dilation of two-dimensional figures on a coordinate plane.
• Describe how the coordinates of a figure's points change after dilation with the origin as the center.
• Apply the concept of scale factor to solve problems involving dilations on the coordinate plane.

Curriculum Context

Grade: Grade 8

Subject: Mathematics

Curriculum: TEKS