Grade 9 Topics The Algebra 1 year — formulas and literal equations, compound and absolute-value inequalities, function notation, linear models and variation, systems of inequalities, piecewise graphs, and data distributions. Each topic is taught from the ground up with interactive, self-checking lessons.
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The course — 7 topics, in order
01 Equations & Formulas Multi-step equations with variables on both sides, special cases, and literal equations — solving formulas for any letter. 6 lessons 02 Inequalities & Absolute Value Compound inequalities (and/or), absolute-value equations, and absolute-value inequalities — distances on the number line. 6 lessons 03 Introduction to Functions Function notation, domain and range, the vertical line test, and reading graphs qualitatively. 6 lessons 04 Linear Models & Variation Writing linear models from context, direct variation revisited, and inverse variation — y = k/x, the other proportionality. 6 lessons 05 Systems of Inequalities Graphing two-variable inequalities, shading half-planes, and systems of inequalities as feasible regions. 6 lessons 06 Piecewise & Absolute-Value Graphs The V of y = |x|, shifts of it, and functions defined in pieces — including step functions. 6 lessons 07 Data Distributions Histograms, box plots, quartiles and IQR — the shape of data and how to compare distributions. 6 lessons