Which relation is a function?

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

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

Which ordered pair is a solution of the equation? 2x+3y=10