Concept:The sign of the slope tells us whether two economic variables move in the same or opposite direction.
Explanation:The slope measures the rate of change of one variable in response to a change in another variable.
Its sign is either positive
(+) or negative
(−).
A positive sign indicates a direct relationship, meaning both variables increase or decrease together.
A negative sign indicates an inverse relationship, meaning as one variable increases, the other decreases.
Thus, the sign of the slope is used to determine the nature or direction of the relationship between the variables under study.
Answer:B. shows the relationship between variables