Answer:
The graph is a convex limacon.
Step-by-step explanation:
Polar equation is defined as
and 
Types of limacon:
1. If b < a, then graph is a limacon with and inner loop.
2. If a < b < 2a, then graph is a dimpled limacon.
3. If 2a ≤ b, then graph is a convex limacon.
The given equation is

Here b=4 and a=2.


![[\because b=4]](https://tex.z-dn.net/?f=%5B%5Cbecause%20b%3D4%5D)
Since 2a ≤ b, therefore the graph is a convex limacon.