Review Unit 4 of AP Calculus AB and BC, focusing on Contextual Applications of Differentiation. Explore key topics including interpreting derivatives in context, straight-line motion, rates of change in various applications, related rates problems, local linearity and linearization, and L'Hospital's Rule. Gain a comprehensive understanding of how differentiation applies to real-world scenarios through clear explanations and examples. Access accompanying study guides and practice questions to reinforce learning and prepare effectively for AP exams.