What do all unit rates have in common

Use set buikder notation to represent the following set: {, -2, -1, 0}

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

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?