Plf(x)=x/2 - 3 and g(x)= 3x^2 + x - 6,find (f + g )(x)a.4x^2 - 9b.3x^2 + 3/2x - 3c.3x^2 - 1/2 x - 3d.3x^2 + 3/2 x - 9

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: .