Learning Focus
Identify functions and describe relationships between inputs and outputs across representations.
Big idea
A function assigns each allowable input exactly one output. You can see this in:
- graphs (vertical line test)
- tables (no repeated input with different outputs)
- equations (a rule that produces one value)
Takeaways
- Ask: “For each , is there exactly one ?”
- Features (intercepts, increasing/decreasing) live on top of that definition.