The table shows the proof of the relationship between the slopes of two perpendicular lines. What is the missing statement in step 6?

Question

anonymous · Answer

Statement	Reason
1. AC←→⊥CD←→ (view diagram)
    ΔABC is similar to ΔCED.	given
2. (This statement is intentionally left blank.)	property of similar triangles
3. ABBC = ECDE 	property of proportion
4. slope of AC←→ = -ABBC 
    slope of DC←→ = DEAC	definition of slope
5. slope of AC←→ × slope of DC←→ = -ABBC×DEEC	multiplying the slopes
6. 	Substitution Property of Equality
7. slope of AC←→ × slope of DC←→ = -1	simplifying the right side

anonymous · Answer

A) slope of AC←→ × slope of DC←→ = ECDE×DEEC

B) slope of AC←→ × -slope of DC←→ = 1

C) slope of AC←→ × slope of DC←→ = 1

D) slope of AC←→ × slope of DC←→ = -ECDE×DEEC