Phillies riding his bike he rides 20 miles in two hours 37 1/2 miles in three hours and 50 miles in four hours find the constant of proportionality and write any equation to describe the situation

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here