Question

Need help, please explain example 1 for me!
http://tutorial.math.lamar.edu/Classes/CalcIII/GreensTheorem.aspx
why is 0<=y<=2x?

Answer 1

\[0\le y \le 2x\]

Answer 2

anyone? just want to know why the boundaries for y is [0,2x]

Answer 3

i think that's just the arbitrary shape they decided on for that particular example. there's nothing special about the value.

Answer 4

yes, but my question is how did they get that boundary from the shape?

Answer 5

that's just how they defined the shape

Answer 6

i understand from the verticies they start with, and the graph they drew. I also understood how they got the boundaries for x, but i don't understand the y boundaries