THE RESEARCH OF CONSUMERS SOLVENT DEMAND FOR TOURIST PRODUCT USING THE 2ND TORNQVIST EQUATION
The article reviews the analysis of conditions, peculiarities and application technics of step-by-step method of iteration to the equation simple regression, which can not reduced to any linear forms of their own parameters and variables. Such practical task appears sufficiently often during the investigation of class of the Tornqvist functions. Particularly, the 2th equation of this class successfully describes families’ cost for the purchase of relatively expensive tourist products for foreign travels. The method of progressive approximation regards the plotting of the normal equations set with application of process Jordan-Gauss and the expansion into the Taylor’s infinite series of the function of the corrections for parameters of the desired equation. The corrections themselves allow to calculate the parameters of Tornqvist function (second equation) and make prognosis of household’s budget spending on expensive travel products.