<prompt> Grafu za vipengele vinne, vilivyo na lebo 2 hadi 5, zimeonyeshwa hapa chini. Kumbuka kuwa kikoa cha chaguo za kukokotoa 3 ni -5,-4,-3,-2,-1,0,1,2. Tafuta bidhaa ya lebo za vitendakazi ambavyo ni isiyobadilika. asyukubwa 8cm;defaultpenlinewidth.7ptfontsize8pt;kuagiza grafu;picha pic1,pic2,pic3,pic4;chorapic1,-8,0--8,0,Mishale4;chorapic1,0,-8--0,8,Mishale4;chorapic2,-8,0--8,0,Mishale4;chorapic2,0,-8--0,8,Mishale4;chorapic3,-8,0--8,0,Mishale4;chorapic3,0,-8--0,8,Mishale4;chorapic4,-8,0--8,0,Mishale4;chorapic4,0,-8--0,8,Mishale4;f halisi x halisi kurudi x2-2x;h halisi x halisi return -atanx;k halisi x halisi rejesha 4x;x halisi;chorapic1,grafuf,-2,4,Vishale4;chorapic3,grafuh,-8,8,Vishale4;chorapic4,grafuk,-8,-0.1254,Vishale4;chorapic4,grafuk,0.1254,8,Vishale4;nuktapic2,-5,3; nuktapic2,-4,5; nuktapic2,-3,1; nuktapic2,-2,0;nuktapic2,-1,2; nuktapic2,0,-4; nuktapic2,1,-3; nuktapic2,2,-2;lebopic1,2,0,-9;lebopic2,3,0,-9;lebopic3,4,0,-9;lebopic4,5,0,-9;ongeza pic1;ongezashift20pic2;ongezashift0,-20pic3;ongezashift20,-20pic4;asy  <response>: Grafu zilizo na lebo 3, 4, na 5 zote zinabadilika kwa kuwa hakuna mstari mlalo unaokatiza grafu katika zaidi ya sehemu moja. Kwa maneno mengine, kwa kila nambari halisi y kuna angalau nambari moja halisi x na fxy. Grafu ya kwanza haikidhi hali hii. Kwa hivyo bidhaa ya lebo zinazolingana na vitendaji visivyoweza kugeuzwa ni 3mara 4mara 560. 