How do you find dy/dx for a set of parametric equations?

Using the chain rule:If the parameter used is 't', differentiate each equation with respect to 't' so that you have answers for dy/dt, and dx/dt.From the chain rule it is known that: "dy/dx=dy/du * du/dx". We treat dy/dt and dx/dt as fractions and so, dy/dx=(dy/dt)/(dx/dt) which gives the value for dy/dx.