Which of these lines in the xy-plane does not contain any point with two negative coordinates? Choose the correct answer
A) y = 3x	B) y = x + 7	C) y = x^2 - 4	D) y = x^3 + 3x	E) y = x^6
x^6 is 0 when x is 0 and positive for all other values of x.   The answer is y = x^6.
<result>E</result>
Which of these lines in the xy-plane does not contain any point with two negative coordinates?