Implicit Differentiation
Channel: Tom Kowalski
Date: 2020-09-23

Even when an equation cannot be solved for y (or for x), it can still implicitly define  a function.  We may still want to know the rate of change of y with respect to x, or the slope of the tangent line to its graph at a given point.  We can use "implicit differentiation" to find the slope of the tangent line.