North Carolina: Grade 8 Math Standards
43 standards · 5 domains
EXPRESSIONS AND EQUATIONS
- NC.8.EE.1 Develop and apply the properties of integer exponents to generate equivalent numerical expressions.
- NC.8.EE.2.a Represent solutions to equations of the form x^2 = p and x^3 = p, where p is a positive rational number.
- NC.8.EE.2.b Evaluate square roots of perfect squares and cube roots of perfect cubes for positive numbers less than or equal to 400.
- NC.8.EE.3 Use numbers expressed in scientific notation to estimate very large or very small quantities and to express how many times as much one is than the other.
- NC.8.EE.4 Perform multiplication and division with numbers expressed in scientific notation to solve real-world problems, including problems where both decimal and scientific notation are used.
- NC.8.EE.7.a Recognize linear equations in one variable as having one solution, infinitely many solutions, or no solutions.
- NC.8.EE.7.b Solve linear equations and inequalities including multi-step equations and inequalities with the same variable on both sides.
- NC.8.EE.8.a Understand that solutions to a system of two linear equations correspond to the points of intersection of their graphs because the point of intersection satisfies both equations simultaneously.
- NC.8.EE.8.b Solve real-world and mathematical problems leading to systems of linear equations by graphing the equations. Solve simple cases by inspection.
FUNCTIONS
- NC.8.F.1.a Recognize functions when graphed as the set of ordered pairs consisting of an input and exactly one corresponding output.
- NC.8.F.1.b Recognize functions given a table of values or a set of ordered pairs.
- NC.8.F.2 Compare properties of two linear functions each represented in a different way (algebraically, graphically, numerically in tables, or by verbal descriptions).
- NC.8.F.3 Identify linear functions from tables, equations, and graphs.
- NC.8.F.4.a Understand that a linear relationship can be generalized by y = mx + b.
- NC.8.F.4.b Write an equation in slope-intercept form to model a linear relationship by determining the rate of change and the initial value, given at least two (x,y) values or a graph.
- NC.8.F.4.c Construct a graph of a linear relationship given an equation in slope-intercept form.
- NC.8.F.4.d Interpret the rate of change and initial value of a linear function in terms of the situation it models, and in terms of the slope and y-intercept of its graph or a table of values.
- NC.8.F.5.a Analyze a graph determining where the function is increasing or decreasing; linear or non-linear.
- NC.8.F.5.b Sketch a graph that exhibits the qualitative features of a real-world function.
GEOMETRY
- NC.8.G.2.a Verify experimentally the properties of rotations, reflections, and translations that create congruent figures.
- NC.8.G.2.b Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations.
- NC.8.G.2.c Given two congruent figures, describe a sequence that exhibits the congruence between them.
- NC.8.G.3 Describe the effect of dilations about the origin, translations, rotations about the origin in 90 degree increments, and reflections across x-axis and y-axis on two-dimensional figures using coordinates.
- NC.8.G.4.a Verify experimentally the properties of dilations that create similar figures.
- NC.8.G.4.b Understand that a two-dimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations.
- NC.8.G.4.c Given two similar two-dimensional figures, describe a sequence that exhibits the similarity between them.
- NC.8.G.5.a Recognize relationships between interior and exterior angles of a triangle.
- NC.8.G.5.b Recognize the relationships between the angles created when parallel lines are cut by a transversal.
- NC.8.G.5.c Recognize the angle-angle criterion for similarity of triangles.
- NC.8.G.5.d Solve real-world and mathematical problems involving angles.
- NC.8.G.6 Explain the Pythagorean Theorem and its converse.
- NC.8.G.7 Apply the Pythagorean Theorem and its converse to solve real-world and mathematical problems.
- NC.8.G.8 Apply the Pythagorean Theorem to find the distance between two points in a coordinate system.
- NC.8.G.9 Understand how the formulas for the volumes of cones, cylinders, and spheres are related and use the relationship to solve real-world and mathematical problems.
THE NUMBER SYSTEM
- NC.8.NS.1 Understand that every number has a decimal expansion. Building upon the definition of a rational number, know that an irrational number is defined as a non-repeating, non-terminating decimal.
- NC.8.NS.2.a Square roots and cube roots to the tenths.
- NC.8.NS.2.b 𝜋 to the hundredths.
STATISTICS AND PROBABILITY
- NC.8.SP.1 Construct and interpret scatter plots for bivariate measurement data to investigate patterns of association between two quantities. Investigate and describe patterns such as clustering, outliers, positive or negative association, linear association, and nonlinear association.
- NC.8.SP.2.a Informally fit a straight line for a scatter plot that suggests a linear association.
- NC.8.SP.2.b Informally assess the model fit by judging the closeness of the data points to the line.
- NC.8.SP.3 Use the equation of a linear model to solve problems in the context of bivariate quantitative data, interpreting the slope and y-intercept.
- NC.8.SP.4.a Construct and interpret a two-way table summarizing data on two categorical variables collected from the same subjects.
- NC.8.SP.4.b Use relative frequencies calculated for rows or columns to describe possible association between the two variables.