Key Concepts:
- To evaluate a function, substitute the given $x$ value into the equation.
- To solve for x given y value, isolate $x$ by applying inverse operations.
Skills Covered:
- Solving for function outputs by substituting x values.
- Solving for x when given (f(x) = y).
Example Problems:
- If (f(x) = 3x - 4), find (f(5)).
- If (C(x) = 50 + 10x), what is $x$ when (C(x) = 200)?