Question 367030
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Hi, 
green parabola is the graph of the parabola f(x) = -2/3{{{x^2}}}
impact of -(2/3) coefficient
1) parabola opens downward
2) parabola opens 'wider' (vertically compressed)
{{{graph( 300, 300,-10,10,-10,10,x^2,(-2/3)x^2) }}}