Let's return to the Folium of Descartes a" + y = 3xy . This curve has rational parametrication a(t) = 3t 3t2 1+13 ' 1++3 Set t = -4 in the GeoGebra app below. - 3xy + y: = 0 3 . 1= -4 4 -3 -2 -1 N - w - (- 4) -2 -3. Find the point a(-4) = [4/21,-16/21] The equation of the tangent to the curve at the point a(-4) is y = The equation of the normal to the curve at the point a(-4) is y =