Practical plane and solid geometry for advanced students, including graphic statics, adapted to the requirements of the South Kensington syllabus (1899)
Harrison, Joseph, Baxandall, George Albert · London Macmillan · leaf 170
perbola ; so also is y altering ; but their productdoes not alter, it is constant so long as we are consideringthe same curve. Whatever curve we may have to deal with, if there besome geometrical fact which is known to be true for any andevery point on it, then the method of representing… … Suppose that in the figure PN= 3 and PM= 5, then thevalue of c in the equation to the curve will be 3 x 5, or 15.Accordingly, at the point on the curve where the x is 2A,the y will be 6 ; at the point where x is 1, y will be 15 ;if x = - 5, y = - 3, and so on. Thus the equation to any curve…
