Tasks: Graphical Calculus Mastery
Session 05-05 Practice Problems
EXAM: This type of problem appears on EVERY exam. Master these skills!
1 Problem 1: Polynomial Function (x)
Given the graph of \(f(x)\) below, sketch the graph of \(f'(x)\).

2 Problem 2: Cubic Function (x)
Given the graph of \(f(x)\), sketch \(f'(x)\) and identify all critical points.

3 Problem 3: Piecewise Linear Function (xx)
Sketch \(f'(x)\) for the piecewise linear function shown. Where does \(f'(x)\) not exist?

4 Problem 4: Absolute Value Function (xx)
Sketch \(f'(x)\) for \(f(x) = |x - 2|\) on the interval \([-1, 5]\).

5 Problem 5: Quartic with Multiple Extrema (xxx)
Sketch \(f'(x)\) and \(f''(x)\) for the quartic function shown.

6 Problems 6-10: Quick Sketches (x)
For each function graph below, sketch \(f'(x)\). Identify critical points.

7 Problem 11: Linear Derivative (x)
Given the graph of \(f'(x)\) below:
- Where is \(f(x)\) increasing? Decreasing?
- Where does \(f(x)\) have local extrema? Classify them.
- Sketch a possible graph of \(f(x)\).

8 Problem 12: Quadratic Derivative (xx)
Given \(f'(x)\) shown below:
- Find all critical points of \(f(x)\) and classify them.
- Where is \(f(x)\) concave up? Concave down?
- Sketch \(f(x)\).

9 Problem 13: Piecewise Constant Derivative (xx)
Given the step function \(f'(x)\) below, sketch \(f(x)\).

10 Problems 14-20: Quick Analysis (xx)
For each derivative graph, answer: Where is \(f\) increasing? Where does \(f\) have local extrema?

11 Problem 21: Comprehensive Analysis (xxx)
Given \(f(x) = x^4 - 4x^3 + 4x^2\):
- Find \(f'(x)\) and \(f''(x)\).
- Find all critical points and classify them.
- Find all inflection points.
- Determine intervals where \(f\) is increasing/decreasing and concave up/down.
- Sketch the graphs of \(f(x)\), \(f'(x)\), and \(f''(x)\) on the same set of axes.
12 Problem 22: Business Application (xxx)
A company’s revenue over 10 months is modeled by: \[R(t) = -t^3 + 9t^2 - 15t + 50\]
where \(t\) is months and \(R\) is in thousands €.
- When is revenue increasing? Decreasing?
- When does revenue reach local extrema? What is the revenue at these points?
- When is the rate of revenue change accelerating? Decelerating?
- Interpret all results in business terms.
13 Problem 23: Challenge Problem (xxxx)
Consider the piecewise function:
\[f(x) = \begin{cases} x^2 & \text{if } x < 1 \\ 3 - x & \text{if } x \geq 1 \end{cases}\]
- Is \(f\) continuous at \(x = 1\)?
- Is \(f\) differentiable at \(x = 1\)?
- Sketch \(f(x)\) and \(f'(x)\).
- Classify \(x = 1\) (corner, cusp, or smooth?).