Learning goals: Teacher Facing Given a linear function in context, describe (using words or equations) its inverse function. Recognize that if one function takes $a$ as its input and gives $b$ as its output, its inverse function takes $b$ as its input and gives $a$ as the output. Understand that the inverse of a linear function can be found by reversing the process that defines the initial function. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from Alg1.4 Functions, Algebra 1.