Question

How do you graph `0<=x<=35` and `0<=y<=20`?

Answer 1

You'll have to draw four lines:

`x=0` which is the `y`-axis
`x=35` which is a vertical line
`y=0` which is the `x`-axis
`y=20` which is a horizontal line

These four lines form a rectangle, and everything inside the rectangle, including the lines themselves (because of `<=` ), form the solution.