Please help.
The graph of a limacon curve is given. Without using your graphing calculator, determine which equation is correct for the graph.

Question

Please help. 
The graph of a limacon curve is given. Without using your graphing calculator, determine which equation is correct for the graph.

anonymous · Answer

attachment

anonymous · Answer

IS that the graph that came with the problem?

anonymous · Answer

I'm so lost.. They call this a limacon, but it looks just like what they called a cardioid.

anonymous · Answer

Yes.

anonymous · Answer

What grade are you in?

anonymous · Answer

11th Pre-Calculus Honors.

anonymous · Answer

is there any answer choices ?

anonymous · Answer

what are the equations

anonymous · Answer

A) r = 2 - 2 sin θ
 B) r = 3 - 2 sin θ
 C) r = 2 + 2 sin θ
 D) r = 1 - 3 sin θ
I went of wolfram alpha and found out the answer, but it says without a calculator...

anonymous · Answer

I got C

anonymous · Answer

That one is upside down, it's the one that's just like that, but subtraction.

anonymous · Answer

i dont think they will find out you use a graph calculator

anonymous · Answer

I know, I would just like to know how without one for the future.

anonymous · Answer

oh i can't help you with that , sorry but you can always look at youtube tutorials

anonymous · Answer

It's okay, I made a 100%. Thanks guys! P.S. It was A.