Question

y varies inversely with x k = 1.4 What is the value of x when y is 5.6? A. x = 4 B. x = 1.4 C. x = 0.25 D. x = 7.84

Answer 1

$\bf \qquad \qquad \textit{inverse proportional variation}\\\\ \textit{\underline{y} varies inversely with \underline{x}}\qquad \qquad y=\cfrac{k}{x}\impliedby \begin{array}{llll} k=constant\ of\\ variation \end{array}\\\\ -------------------------------\\\\ k=1.4\qquad y=\cfrac{1.4}{x} \\\\\\ \textit{What is the value of x when y is 5.6?}\qquad 5.6=\cfrac{1.4}{x}$

solve for "x".