Given: and Prove: slope of × slope of = -1 Statements Reasons 1. is similar to Given 2. Property of similar triangles 3. slope of slope of Definition of slope 4. slope of slope of Multiplying the slopes 5. Substitution property of equality 6. slope of slope of = -1 Simplifying the right side The table shows the proof of the relationship between the slopes of two perpendicular lines. What is the missing statement in step 5? A. B. C. D.