- One output for each input
- Graphs, equations, domain and range
- Putting a number in
- Squares, sums and expressions as inputs
- Solving f(x) = a number
- From an equation to a rule
- Saying what f(a) = b means
- Questions and expressions in context
- Domain and range from a graph
- The domain of a formula
- Choosing the domain
- The matching range and graph
- Unlocks after
- Opens up