Express #theta# in radian, for parity in unit of scale for both r and #theta#.The graph emanates from the pole as a spiral that diverges radially, from the pole, at the rate 2 units/(turn of 1 rad).

Explanation:

The table for making the graph could be # {(r, theta)} = (0. 0), (pi/4, pi/8), (pi/2, pi/4), ...,(2pi, pi), ...#