The following graph contains four lines (A, B, C and D), each of which has a slope that is either positive, negative, zero, or infinite.For each of the following scenarios, indicate whether the relationship between the two variables is positive or negative, as well as which line on the previous graph has a slope that reflects this type of relationship. Hint: The X-axis and Y-axis on the graph are not labeled intentionally. You need to substitute the variables from each scenario...