Given the diagram, what is the length of QR?

Me figure out the process to determine x you appreciate it : )

The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 f

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