What is the contrapositive of the conditional statement?If two variables are directly proportional, then their graph is a linear function.

Let p be “the variables are directly proportional” and q be “their graph is a linear function.” The contrapositive of p → q is not q → not p: reverse the two parts and negate each one. So the contrapositive is “If the graph is not a linear function, then the variables are not directly proportional,” which is choice D.

AI-written and checked against the verified answer.