Chapter 5 Polynomials and Polynomial Functions - 5.2 Evaluate and Graph Polynomial Functions - 5.2 Exercises - Mixed Review - Page 344: 69

$x=\frac{15}{2}$ $y=-\frac{2}{5}x$

$x$ varies directly with $y$ $y=kx$ $y=\frac{-4}{10}x$ $y=-\frac{2}{5}x$ Determine x by substituting y in the variation equation: $y=-\frac{2}{5}x$ $x=\frac{y}{-\frac{2}{5}}$ $x=\frac{-3}{-\frac{2}{5}}$ $x=\frac{15}{2}$