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Graphing Systems of Linear EquationsGraphing Systems of Linear EquationsUse this algebra worksheet to give students practice graphing a system of linear equations to determine if there is one solution, no solution, or infinitely many solutions. Eighth (or 8th) grade is a year of education in the United States. The eighth grade is the final grade before high school, and the ninth grade of public and private education, following kindergarten and subsequent grades. (Although it may be considered the tenth or eleventh if preschool has been attended.) Most students are between thirteen and fourteen years old. Eighth grade is usually the fourth and final grade of middle school, although some systems mark it as the final year of elementary school.The eighth grade mathematics curriculum in the United States includes either Pre-Algebra, Algebra I, or Geometry. Occasionally Algebra II is also taught in very advanced schools. In some schools, especially the ones that are witnessing the required Basic Standards Test, basic everyday real world mathematical skills such as check writing, money management, and geometry are taught as well. What is 8th grade math all about?In eighth grade, students make several advances in their algebraic reasoning, particularly as it relates to linear equations. Students extend their understanding of proportional relationships to include all linear equations, and they consider what a solution looks like when it applies to a single linear equation as well as a system of linear equations. They learn that linear equations can be a useful representation to model bivariate data and to make predictions. Functions emerges as a new domain of study, laying a foundation for more in-depth study of functions in high school. Lastly, students study figures, lines, and angles in two-dimensional and three-dimensional space, investigating how these figures move and how they are measured.How did we order the units?In Unit 1, Exponents and Scientific Notation, students start off the year with a study of patterns and structure, using this structure to formalize properties of exponents. They reach back to skills learned in sixth grade to simplify complex exponential expressions and to represent and operate with very large and very small numbers.In Unit 2, Solving One-Variable Equations, students continue to hone their skill of solving equations. Students solved equations in sixth and seventh grades, and in eighth grade, students become more efficient and more strategic in how they approach and solve equations in one variable. Including this unit at this point in the year allows time for spiraling and incorporating these skills into future units.In Unit 3, Transformations and Angle Relationships, students formalize their understanding of congruence and similarity as defined by specific movements of figures in the coordinate plane. They experiment with, manipulate, and verify hypotheses around how shapes move under different transformations. Studying similarity, students observe how ratios between similar triangles stay the same, which sets them up for understanding slope in Unit 5. Students also make informal arguments, which prepares them for more formal proofs in high school geometry.Unit 4, Functions, introduces students to the concept of a function, which relates inputs and outputs. Students analyze and compare functions, developing appropriate vocabulary to use to describe these relationships. They investigate real-world examples of functions that are both linear and nonlinear, and use functions to model relationships between quantities. This introductory study of functions prepares students for Unit 5, in which they focus on a particular kind of function—linear equations.Unit 5, Linear Relationships, and Unit 6, Systems of Linear Equations, are all about lines. Students make the connection between proportional relationships, functions, and linear equations. They deepen their understanding of slope, making the connection back to similar triangles in Unit 3. Students think critically about relationships between two quantities: how they are represented, how they compare to other relationships, and what happens when you consider more than one linear equation at a time. Throughout these two units, students utilize their skills from Unit 2 as they manipulate algebraic equations and expressions with precision.In Unit 7, Pythagorean Theorem and Volume Applications, students discover the Pythagorean Theorem, which is supported by a study of irrational numbers. Students now have a full picture of the real number system.Lastly, in Unit 8, Bivariate Data, students analyze data in two variables using linear equations and two-way tables. They use these structures to make sense of the data and to make justifiable predictions.Note that this course follows the 2017 Massachusetts Curriculum Frameworks, which include the Common Core Standards for Mathematics.Math worksheets and visual curriculum If youre seeing this message, it means were having trouble loading external resources on our website. If youre behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
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