Question

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

a circular graph with an indentation on the left toward the origin, but not touching the origin

[-5, 5] by [-5, 5]

r = 2 + 3 cos θ
r = 3 + 2 cos θ
r = 2 + 2 cos θ
r = 4 + cos θ

Answer 1

I think its the third option

Answer 2

nope, it 's not that.

Answer 3

oh, okay.

Answer 4

suppose r = 2+2cos theta is the answer,
if theta =0, then cos theta =1 and 2 costheta =2, and r =4, it's ok, but
if theta =180 then cos theta =-1 and 2 cos theta =-2, and r =0, that is not the case in the graph, right?

Answer 5

no, its not.