Limacon

Which equation represents the graph?

• $r=9-\cos\theta$

• $r=2-8\cos\theta$

• $r=3+7\sin\theta$

• $r=4-6\cos\theta$

The graph shown here is  $r=5+b\sin\theta$  .  What is the value of b?  

The function  $r=a+7\cos\theta$  is shown here.  What is the value of a?

What is the polar equation of the graph shown here?

• r = 4

• $r=4\theta$

• $\theta=4$

• $\theta=\frac{\pi}{4}$

The polar function  $\theta=\frac{\pi}{6}$  is equivalent to the rectangular equation...

•  $y=x$  

•  $y=\frac{\sqrt{3}}{3}x$  

•  $\left(x-1\right)^2+\left(y+1\right)^2=1$  

•  $x=0$  

The polar equation  $r=3-9\cos\theta$  is symmetrical about the ...

• x-axis

• y=axis

• origin

The polar equation  $r=3+3\cos\theta$  is symmetrical about the ...

• x-axis

• y=axis

• origin

The polar equation  $r=3-\sin\theta$  is symmetrical about the ...

• x-axis

• y=axis

• origin

What makes  $r=a-b\cos\theta$  a cardioid limacon?

• when  $a\ge2b$  

• when a > b

• when a = b

• when b < a < 2b

What is the equation of the graph shown?

• $r=71-9\sin\theta$

• $r=24-55\sin\theta$

• $r=30+50\sin\theta$

• $r=50-31\sin\theta$