What is the biconditional statement of the following conditional statement?
"If the product of the slopes of two lines is -1, then the lines are perpendicular."
O If the lines are perpendicular, then the product of the slopes of two lines is -1.
O The product of the of slopes of two lines is -1 if and only if the lines are perpendicular.
O If the product of the slopes of two lines is not -1, of then the lines are not perpendicular.
O If the two lines are not perpendicular, then the product of the slopes of two lines is not -1.
