Bivariate Data and Lines of Fit: Math Unit 8, Grade 8 (Letters & Devotion)

Description

Bivariate Data and Lines of Fit is Unit 8 of Pre-Algebra: Foundations for Algebra I (Grade 8), the Letters & Devotion Math course, complete in one printable PDF: 12 lessons, the unit check-up and the answer key, 75 pages.

• Patterns of association in scatter plots (positive, negative, none)
• Linear vs. nonlinear association, clusters, and outliers in bivariate data
• Informal line of fit placement
• Criteria for judging quality of a line of fit
• Slope-intercept equation of a fitted line
• Contextual meaning of slope and intercept in a bivariate data model
• Interpolation using a line of fit, and reasonableness of prediction
• Two-way tables and relative frequency for categorical bivariate data
• Association between categorical variables via relative frequency comparison
• Complete line-of-fit modeling process applied to a novel dataset
• Evaluation of another student’s line-of-fit reasoning against data evidence
• The distinction between a statistical trend and an exact linear rule

Every lesson is written for a parent with no teaching background: it opens with a short script to read aloud, names the specific wrong idea a student is likely to reach for and how to correct it, and closes with a practice sheet you may copy for your household. Scripture references are King James Version throughout. Black-and-white, 8.5 x 11 in. The whole year of this course is also in this store as a single book.

AI note: The written content of this resource was drafted with AI tools, then reviewed and edited by the author.