Analytic geometry, for technical schools and colleges (1897)
Lambert, Preston Albert, 1862-1925 · New York, Macmillan · leaf 97
rmal equa-tion of a straight line.The different forms ofthe equation of a straight line can be obtained from the generalfirst degree equation in two variables Ax -\- By -\- C = 0, whichalways represents a straight line. (a) Suppose the two points (x, y), (x, y) -to lie in the linerepresented by the… … y-y = y — y x - x (x-x). (b) Callin;X-axis ((, on : the intercept of the line Ax -\- By +C —0 on the Cthe F-axis b, for y = 0, x = - = a, for x — 0, y — — b. Substituting in the equation Ax -f By + C = 0, there results --f-?^=l.a h IliOriCliTIES OF THE STliAKniT LINE 83 (f) Tlie equation .l.i- +…
Geometry, Analytic
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