(3,4) and (-5,6) are "coordinate planes".
These appear in algebra and math when you're graphing. These coordinate planes consist of "x" and "y" (x,y). The x's (which are 3 and -5 in your situation) should be graphed accordingly using the x-axis and the y's (which are 4 and 6 in your situation) should be graph accordingly using the y-axis.
Its adding 9 every time.
-3, 6, 15, 24, 33, 42, 51, 60
20%, because if 65 is 100, then 52 is 80% out of 65; so 100 - 80 is 20
