are collecting sponsors for a walk-a-thon. The equation for walking x miles. The table shows the relationship 9. Make Sense and Persevere Beth, Manuel, and Petra y=20x represents the amount of money Beth raises WAL SPONSORS NAME Man between the number of miles Manuel walks and the amount of money he will raise. Petra will earn $15 for each mile that she walks. © MP.1 a. In order to compare the proportional relationships, what quantities should you use to find the unit rate? MILES W 3 5 7 b. Compare the amount of money raised per mile by the three people.