Bailey, Frederick H. (Frederick Harold), 1865- · Boston, London, Ginn & Co. · leaf 79
= 1, yi = — ^5. ... y+ .3= l(x-l) or y- x + 4 = 0is tlie eqviation of the line. 64 PLANE ANALYTIC GEOMETKY. Ex. 2. Find the equation of the line through (— 1, — 2) parallel tothe line x + 2y — 1 = 0. The required line will obviously have the same slope as the given line.X + 2y — 1=0 may be… … Let Pifxj, yi) and P2(x2, yg) be the two given points, andlet P(x, y) 1)6 any point on the line through tliem. DraAv PiMi, PM.^, and PM all parallel to YY and PjS par-allel to XX. Then the triangles PjSP and P1RP2 are similar,their sides being resjiectively parallel, so that their homol-ogous sides…
Geometry, Analytic
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