I'm having trouble even knowing where to begin with the following problem. I understand the last part about finding the direction through vector derivatives, but I'm stuck on the first part about how to conver to rectangular coordinates, please help.

In each of the following, find an equation in rectangular coordinates of the graph of the vector function. Sketch the graph and indicate the direction in which it is transversed by considering the behavior of the vector derivative for appropriate valus of the parameter.

F(t)=< 1, 1-t >