Question

Question #7e240

Answer 1

Think about (or sketch) the standard graph for `r = cos theta`
Then stretch all `r` values by a factor of `3`.

Answer 2

You should get a circle.

Let us give values for `theta` and evaluate `r`:

And graphically:

Remember that for a certain angle `theta` the negative `r` value is the same but "reflected" about the origin (for example `r=-1.5` in figure).

Hope it helps (even if my graph is a little bit crap!!!)