x = y - (1/y), where x and y are both > 0. If the value of y is doubled in the equation above, the value of x will
Choices:
A) decrease B) stay the same C) increase four fold D) just more than double E) increase to more than five times
Alternate approach   Plug in some values of y &gt; 0   Let y = 10   So, x = y - (1/y)   Or, x = 10 - (1/10)= 
<gadget id="calculator">10 - (1/10)</gadget>
<output>99/10 = around 9.9</output>
9.9   Let y= 20   So, x = y - (1/y)   Or, x = 20 - (1/20)= 
<gadget id="calculator">20 - (1/20)</gadget>
<output>399/20 = around 19.95</output>
&gt;19.95   So, x increases from 9.9 to 19.95   Hence the number increases 2 times, thus the correct answer will be (just more than double)
<result>D</result>
x = y - (1/y), where x and y are both > 0. If the value of y is doubled in the equation above, the value of x will