Question 150461
a>0
{{{ graph( 300, 200, -5, 5, -10, 10, (x-2)^2+2) }}}
a<0
{{{ graph( 300, 200, -5, 5, -10, 10, -(x-2)^2+2) }}}
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a=1 (red, wide),2 (green, narrower),3 (blue, narrowest)
{{{ graph( 300, 200, -5, 5, -10, 10, x^2, 2x^2, 3x^2) }}}