Question 644391
Let's compare:


{{{ drawing(500, 500, -10, 10, -10, 10,
 graph( 500, 500, -10, 10, -10, 10,0,(-x^2)/2,x^2)

)}}}

Note: -x^2/2 is in green and x^2 is in blue


So it is true. You'll see the difference in width more clearly if you compare x^2/2 with x^2, but you get the idea.