Question

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

Answer 1

We begin by defining contrapositive :

Contrapositive

A proposition or theorem formed by contradicting both the subject and the predicate or both the hypothesis and conclusion of a given proposition or theorem and changing them.

For example:

The contrapositive of if A then B is :

If not A then not B.

Therefore the contrapositive of the above statement is :

If two variables are not directly proportional then their graph is not a linear function.