Calculus, with applications; an introduction to the mathematical treatment of science (1900)
Hayes, Ellen, 1851- · Boston, Allyn and Bacon · leaf 129
are any twopoints on a straight line, while P(x, y) is the moving point. From similartriangles (Fig. 12), PQr _PD. … FQ PD that is, y ->/ _y-y x — x x — x This equation wedescribe as the equa-tion to the straightline in terms of the coordinates of two points throughwhich it passes. For example, the points (—2, 1), (3, — 4) determinea line whose equation is y 1 4-1 z-(-2) 3-(-2y which becomes, after reducing, x…
Calculus · Geometry, Analytic
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
