Solution
Graph a: positively related
Graph b: unrelated
Graph c: inversely related
Graph d: unrelated
Guided Solution
Graphs of variables that are positively related rise from left to right, indicating that as the independent variable moves, the dependent variable moves in the same direction. Graph a is an example of a positive relationship.
Graphs of variables that are inversely related fall from left to right, indicating that as the independent variable moves, the dependent variable moves in the opposite direction. Graph c is an example of an inverse relationship.
Graphs of variables that are unrelated have no discernable pattern, indicating that the movement of one variable has no impact on the movement of the other variable. Graphs b and d are examples of unrelated variables.