Having ethos is having the characteristics of trustworthiness and credibility. If you display signs of ethos, you are trusted and people believe you.
Pathos: Emotion/ Values
Having pathos is showing emotion and value. You really express yourself, and know what's best.
Logos: Logic/ Reason/ Proof
Showing signs of Logos means that you have knowledge, reasoning, and proof. These could be shown through the use of percentages in charts, or with facts found in studies.