y = kx - y varies directly as x in this function
[tex]y= \frac{k}{x} [/tex] - y varies inversely as x in this function
For [tex]y= \frac{1}{4} x[/tex] y varies directly as x
For [tex]y= \frac{1}{4x} =\frac{\frac{1}{4}}{x}[/tex] y varies inversely as x
