Question 320771
{{{ drawing( 300,300, -10, 10, -10, 10, locate(4,2,f(x)),locate(4,7,g(x)),locate(4,-5,s(x)),graph( 300,300, -10, 10, -10, 10, (1/7)x^2,(1/7)x^2+5,(1/7)x^2-7 )) }}}