Is this the excerpt your talking about: ushered me into a small and exceedingly neat parlor, containing, among other indications of refined taste, many books, drawings, pots of flowers, and musical instruments. A cheerful fire blazed upon the hearth. At a piano, singing an aria from Bellini, sat a young and very beautiful woman,
The Y-intercept would be the value of y when x is at 0, which is when the Y axis is intercepted. -3/7 is the starting position of the function when the the X = 0.