applied calculus principles and applications ed from the other formula by solvingor the first may be obtained from this as all variableschange with time that is are functions of time time ratesare most common 6 to show geometrically lini rl slope of let opn be the locus oi y fx pps a secant and pta tangent at p if arc op s arc ppi as let om x mmi tx then mp y dpi yhence 7 slope of secant ppisax pd conceive the secant ppis to be re volved about p so that arc pp as 0 then x 0 a 0 andthe slope of the secant the slopeof th 2cgh9nf.jpg from 1st time xxxမြ View Photo