Did i do these problem correctly i need

What is the 12th term of b(n)=-4-2(n-1)

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 graph: .

Put the equation in slope intercept form by solving for y