This site allows users to explore and visualize the concept of implicit differentiation that is typically introduced in the first semester of Calculus. The user has control (via sliders) over 3 parameters. By changing these parameters, it is possible to generate a variety of equations that implicitly define curves in xy-plane. Then the user can click and drag a point on the curve with the tangent line shown and slope calculated numerically. Several questions are also provided to guide the exploration.