IXL - Washington eighth-grade math standards

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Skills available for Washington eighth-grade math standards

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Standards document:

2010 Common Core State Standards 2010 Common Core State Standards
2008 Washington Standards 2008 Washington Standards

Print standards

8.1 Linear functions and equations

8.1.A Solve one-variable linear equations.
8.1.B Solve one- and two-step linear inequalities and graph the solutions on the number line.
8.1.C Represent a linear function with a verbal description, table, graph, or symbolic expression, and make connections among these representations.
8.1.D Determine the slope and y-intercept of a linear function described by a symbolic expression, table, or graph.
8.1.E Interpret the slope and y-intercept of the graph of a linear function representing a contextual situation.
8.1.F Solve single- and multi-step word problems involving linear functions and verify the solutions.
- Linear functions: Find points on a function graph (Eighth grade - V.5)
- Linear functions: Linear function word problems (Eighth grade - V.8)
8.1.G Determine and justify whether a given verbal description, table, graph, or symbolic expression represents a linear relationship.
- Nonlinear functions: Identify linear and nonlinear functions (Eighth grade - W.1)

8.2 Properties of geometric figures

8.2.A Identify pairs of angles as complementary, supplementary, adjacent, or vertical, and use these relationships to determine missing angle measures.
- Geometry: Identify complementary, supplementary, vertical, adjacent, and congruent angles (Eighth grade - Q.1)
- Geometry: Find measures of complementary, supplementary, vertical, and adjacent angles (Eighth grade - Q.2)
8.2.B Determine missing angle measures using the relationships among the angles formed by parallel lines and transversals.
- Geometry: Transversal of parallel lines (Eighth grade - Q.3)
8.2.C Demonstrate that the sum of the angle measures in a triangle is 180 degrees, and apply this fact to determine the sum of the angle measures of polygons and to determine unknown angle measures.
- Geometry: Find missing angles in triangles and quadrilaterals (Eighth grade - Q.6)
- Geometry: Interior angles of polygons (Eighth grade - Q.8)
8.2.D Represent and explain the effect of one or more translations, rotations, reflections, or dilations (centered at the origin) of a geometric figure on the coordinate plane.
8.2.E Quickly recall the square roots of the perfect squares from 1 through 225 and estimate the square roots of other positive numbers.
8.2.F Demonstrate the Pythagorean Theorem and its converse and apply them to solve problems.
8.2.G Apply the Pythagorean Theorem to determine the distance between two points on the coordinate plane.
- Coordinate graphs: Distance between two points (Eighth grade - P.4)

8.3 Summary and analysis of data sets

8.3.A Summarize and compare data sets in terms of variability and measures of center.
8.3.B Select, construct, and analyze data displays, including box-and-whisker plots, to compare two sets of data.
8.3.C Create a scatterplot for a two-variable data set, and, when appropriate, sketch and use a trend line to make predictions.
- Charts and graphs: Scatter plots (Eighth grade - N.13)
8.3.D Describe different methods of selecting statistical samples and analyze the strengths and weaknesses of each method.
- Statistics: Identify representative, random, and biased samples (Eighth grade - BB.6)
8.3.E Determine whether conclusions of statistical studies reported in the media are reasonable.
8.3.F Determine probabilities for mutually exclusive, dependent, and independent events for small sample spaces.
8.3.G Solve single- and multi-step problems using counting techniques and Venn diagrams and verify the solutions.

8.4 Additional Key Content

8.4.A Represent numbers in scientific notation, and translate numbers written in scientific notation into standard form.
- Scientific notation: Convert between standard and scientific notation (Eighth grade - G.1)
8.4.B Solve problems involving operations with numbers in scientific notation and verify solutions.
- Scientific notation: Multiply numbers written in scientific notation (Eighth grade - G.3)
- Scientific notation: Divide numbers written in scientific notation (Eighth grade - G.4)
8.4.C Evaluate numerical expressions involving non-negative integer exponents using the laws of exponents and the order of operations.
8.4.D Identify rational and irrational numbers.
- Number theory: Classify numbers (Eighth grade - A.8)
- Rational numbers: Identify rational and irrational numbers (Eighth grade - D.1)

8.5 Reasoning, problem solving, and communication