Graph inequalities, contour plots, density plots and vector fields. Use rectangular, polar, cylindrical, or spherical coordinates. Solve equations numerically, graphically, or symbolically. "Graphing Calculator is one of the best examples of elegant power and clean user interface of any application I've seen." curves defined by parametric equations. In fact, it’s instructive to watch a parametric curve being drawn by a graphing calculator. The points are plotted in order as the corresponding parameter values increase. I am trying to find both the parametric and symmetric equations of a line passing through two points. This is for a study exam, so exact answers are I found the points vectors then put them with respect to t: $$r(t) = (3,-1,1)+t(-2,1,1)$$. Then set each x,y,z to t, which should be the parametric equation...In calculus, a parametric derivative is a derivative of a dependent variable with respect to another dependent variable that is taken when both variables depend on an independent third variable, usually thought of as "time" (that is, when the dependent variables are x and y and are given by parametric equations in t