Describe the properties of functions to define, evaluate | Describe the properties of functions to define, evaluate, and compare relationships, and use functions and graphs of functions to model and explain real phenomena. | 8.FGR.5 |
Show and explain that a function is a rule that assigns to each input exactly… | Show and explain that a function is a rule that assigns to each input exactly one output. | 8.FGR.5.1 |
Within realistic situations, identify and describe examples of functions that… | Within realistic situations, identify and describe examples of functions that are linear or nonlinear. Sketch a graph that exhibits the qualitative features of a function that has been described verbally. | 8.FGR.5.2 |
Relate the domain of a linear function to its graph and where applicable to the… | Relate the domain of a linear function to its graph and where applicable to the quantitative relationship it describes. | 8.FGR.5.3 |
Compare properties (rate of change and initial value) of two functions used to… | Compare properties (rate of change and initial value) of two functions used to model an authentic situation each represented in a different way (algebraically, graphically, numerically in tables, or by verbal descriptions). | 8.FGR.5.4 |
Write and explain the equations y = mx + b | Write and explain the equations y = mx + b (slope-intercept form), Ax + By = C (standard form), and (y − y1
) = m(x − x1
) (point-slope form) as defining a linear function whose graph is a straight line to reveal and explain different properties of the function. | 8.FGR.5.5 |
Write a linear function defined by an expression in different but equivalent… | Write a linear function defined by an expression in different but equivalent forms to reveal and explain different properties of the function. | 8.FGR.5.6 |
Construct a function to model a linear relationship between two quantities | Construct a function to model a linear relationship between two quantities. Determine the rate of change and initial value of the function from a description of a relationship or from two (x,y) values, including reading these from a table or from a graph. | 8.FGR.5.7 |
Explain the meaning of the rate of change and initial value of a linear… | Explain the meaning of the rate of change and initial value of a linear function in terms of the situation it models, and in terms of its graph or a table of values. | 8.FGR.5.8 |
Graph and analyze linear functions expressed in various algebraic forms and… | Graph and analyze linear functions expressed in various algebraic forms and show key characteristics of the graph to describe applicable situations. | 8.FGR.5.9 |
Solve practical, linear problems involving situations using bivariate… | Solve practical, linear problems involving situations using bivariate quantitative data. | 8.FGR.6 |
Show that straight lines are widely used to model relationships between two… | Show that straight lines are widely used to model relationships between two quantitative variables. For scatter plots that suggest a linear association, visually fit a straight line, and informally assess the model fit by judging the closeness of the data points to the line of best fit. | 8.FGR.6.1 |
Use the equation of a linear model to solve problems in the context of… | Use the equation of a linear model to solve problems in the context of bivariate measurement data, interpreting the slope and intercepts. | 8.FGR.6.2 |
Explain the meaning of the predicted slope | Explain the meaning of the predicted slope (rate of change) and the predicted intercept (constant term) of a linear model in the context of the data. | 8.FGR.6.3 |
Use appropriate graphical displays from data distributions involving lines of… | Use appropriate graphical displays from data distributions involving lines of best fit to draw informal inferences and answer the statistical investigative question posed in an unbiased statistical study. | 8.FGR.6.4 |
Justify and use various strategies to solve systems of linear equations to… | Justify and use various strategies to solve systems of linear equations to model and explain realistic phenomena. | 8.FGR.7 |
Interpret and solve relevant mathematical problems leading to two linear… | Interpret and solve relevant mathematical problems leading to two linear equations in two variables. | 8.FGR.7.1 |
Show and explain that solutions to a system of two linear equations in two… | Show and explain that solutions to a system of two linear equations in two variables correspond to points of intersection of their graphs, because the points of intersection satisfy both equations simultaneously. | 8.FGR.7.2 |
Analyze and solve systems of two linear equations in two variables… | Analyze and solve systems of two linear equations in two variables algebraically to find exact solutions. | 8.FGR.7.4 |
Create and compare the equations of two lines that are either parallel to each… | Create and compare the equations of two lines that are either parallel to each other, perpendicular to each other, or neither parallel nor perpendicular. | 8.FGR.7.5 |
Approximate solutions of two linear equations in two variables by graphing the… | Approximate solutions of two linear equations in two variables by graphing the equations and solving simple cases by inspection | 8.FGR.7.3 |