Calculus, with applications; an introduction to the mathematical treatment of science (1900)
Hayes, Ellen, 1851- · Boston, Allyn and Bacon · leaf 55
uation y = x + 2, for example, merely says thatthe point moves so that its ordinate is all the time equalto its abscissa increased by the constant 2. Whenthe graph is thus looked upon as the path of a movingpoint, the variable coordinates x and y are called cur-rent coordinates. Any equation in two… … Fig. 2. 38. Suppose the moving point describes the arc CO1of the graph or curve y =f(x). Let P be any point in the path and Qanother point. Asthe moving pointgoes from P to Q,its abscissa changesfrom x to x + 8x,and its ordinatefrom y to y + S?/.Draw PL paral-lel to the ;r-axis.Then PL = &£…
Calculus · Geometry, Analytic
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