Question 1024627
Y varies directly to x^2. If x is decreased 
by 200%, find the percentage decrease in y.
 
My solution-- y=kx^2
1. X itself is 100% so if decrease by 200%, 
the new x will be x-x-x= -x

2. The new y = k (-x)^2------= kx^2

3.  Percent decrease =. Kx^2- kx^2)/ kx^2

Step 3 made me confused if y= 0%
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It is zero.  The value of y is the same at x and -x.