From the Smarter Balanced Assessments, a Common Core-inspired, standardized test consortium now consisting of about 12 states.
The Common Core goal in question?
Grade 8 » Functions » Use functions to model relationships between quantities. » 5
Describe 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 that has been described verbally.
Labels vs. Concepts
If you factor out the hurdle of knowing the meanings of the various labels ("linear", "non-linear," "positive slope," "negative slope"), how much mathematical challenge is left, and at approximately what grade level would you put it?