8.AT.D: Model with functions.

Model with functions.

8.AT.D.9Interpret the graph of a linear function in the form y = mx + b. a. Given the graph of a linear function, identify the slope and y-intercept. b. Match a linear equation in the form y = mx + b to its graph.8.AT.D.10Construct and interpret a linear function to model a relationship between two quantities. a. Given two input-output pairs, a graph, a table, or a description of a relationship, determine the rate of change and initial value and write the linear equation that models the situation. b. Interpret the rate of change and initial value in the context of the problem.8.AT.D.11Describe qualitatively the functional relationship between two quantities by analyzing a graph (e.g., where the function is increasing or decreasing, linear or nonlinear). Sketch a graph that exhibits the qualitative features of a function based on a narrative description.

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