Question

The last option is d. The function is negative when x>0

Answer 1

1) In this function, note that the line comes from Quadrant III to Quadrant I.

Note also that for x< 0 the function is going to yield negative results

(-1,-1), (-2,-2), (-5,-5) etc.

2) So we can state that the function is negative when x< 0, since this is the function y=x

3) Hence, the answer is A