Find an equation of the tangent line to the curve at each given point. X=t24; y=t22t Find dy/dx and d'y/dx , and find the slope and concavity (if possible) at the given value of the parameter. (If an answer does not exist, enter DNE.) Parametric Equations Point x = 7t, y = 8t - 6 t = 4 dy dx day dx 2 slope concavity : V ---Select--- concave upward Need Help concave downward Watch It neither Submit