Learning goals: Teacher Facing Compare and contrast (orally and in writing) different linear models of the same data, and determine (in writing) the range of values for which a given model is a good fit for the data. Create a model of a non-linear data using a linear function, and justify (orally and in writing) whether the model is a good fit for the data. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 8.5 Functions and Volume, Grade 8.