Well, I live in Brazil and even though I'm not a complete wiz in math I have taken the dangerous path of Mathematics Higher Level at school. We follow the IB Curriculum. I have been struggling with calculas lately because I simply do not understand the concept of implicit differentiation. I was hoping someone could help me in a nice and digestible (very easy and slow) way to understand it. Please go slow on me cause I'm not the brightest bulb of the pack.