Section+9.7

20. r=2 my scanner won't work but it is a circle with a radius of 2 Worked by Mary Catherine Edwards

22. theta=-5pi/3 Graph is a straight line that goes from the first quadrant and goes through the third (scanner wouldn't copy) Worked by Jake Duffy

36. Checked by Scott Trostle

44. It looks like an oval on its side, resting on the x axis. Worked and checked by Clint Patterson