Polar equation of a simple parametric

[Exeneva]

Homework Statement

Write the polar equation for the graph y = x.

Homework Equations

$$x = r cos \theta$$
$$y = r sin \theta$$

The Attempt at a Solution

I came up with $$\theta = \pi/4$$ because at $$\pi/4$$, the x and y coordinates match each other. I'm not sure this is correct, though.

 

[rock.freak667]

Yes, that should be correct.