To accurately determine the nature of the change from Line W to Line X, we would need to analyze the slopes of both lines. If Line W has a negative slope and Line X has a positive slope, then there is a change from negative to positive. Additionally, if the slope of Line X is three times greater than the slope of Line W, that would indicate a factor change of 3.
Given your responses, the correct choice would be:
"There is a slope change from negative to positive and by a factor of 3."
If the actual graph indicated that Line W has a negative slope and Line X has a positive slope, with a factor of 3 change in slopes, then this would be the appropriate answer.