Graph the line with slope 3/4 passing through the point (4,-2)

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

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Someone answer this check out the image!