Answer
circle, center $(1,-2)$, radius $r=3$.
See graph.
Work Step by Step
1. Given $x^2+y^2-2x+4y-4=0\Longrightarrow (x-1)^2+(y+2)^2=9$,
we can identify it is a circle with center $(1,-2)$, radius $r=3$.
2. Use the results above to plot. See graph.
