Final answer:
The question asks for a linear arrangement based on a conditional statement involving the positions of two dancers, J and M, which can be represented in various mathematical forms.
Step-by-step explanation:
The linear arrangement that a student is asking for is a conditional statement: J dances fifth only if M dances second. This scenario can be represented in several ways such as a logical expression or a simple list describing the order of the dancers. It's important to note that the statement implies that J's position as the fifth dancer is contingent on M being the second dancer; however, it does not mean that if M dances second, J must dance fifth, only that if J is dancing fifth, then M must have danced second.