Learning Goal: Introduce functions with a Desmos activity, make connection about what makes a function functional using a mistake from the activity, and practice some example problems.

Classwork

• Function Carnival (Desmos)
• Connection Handout / Notes
  1. Start by showing this screencast of Cannon Man multiplying
  2. Ask students to discuss why this happened
  3. Make the connection to the vertical line test
  4. Move onto notes

Answers:

• Link to Answers

Standards:

• Common Core
  • HSF.IF.A.1 – Understand that a function from one set (called the domain) to another set (called the range) assigns to each element of the domain exactly one element of the range. If f is a function and x is an element of its domain, then f(x) denotes the output of f corresponding to the input x. The graph of f is the graph of the equation y = f(x).
  • HSF.IF.A.2 – Use function notation, evaluate functions for inputs in their domains, and interpret statements that use function notation in terms of a context.
• TEKS (2015-16)
  • A.12(A) – decide whether relations represented verbally, tabularly, graphically, and symbolically define a function