<prompt> Ifuatayo ni sehemu ya grafu ya chaguo za kukokotoa, ygx:asykuagiza grafu; ukubwa 8cm; halisi lsf0.5; pen dpslinewidth0.7fontsize10; defaultpendps; kalamu dsnyeusi; xmin halisi-6.25,xmax6.25,ymin-6.25,ymax6.25;kalamu cqcqcqrgb0.75,0.75,0.75;gridi kalamu gslinewidth0.7cqcqcqlinetype2 2; gx1,gy1 halisi;kwaiceil halisixmingxgx;isakafuxmaxgxgx;igx chorai,ymin--i,ymax,gs; kwareal iceilymingygy;ifloorymaxgygy;igy drawxmin,i--xmax,i,gs;Laxis ya lebo; laxis.pfontsize10;xaxis,xmin,xmax,Tickslaxis,Hatua1.0,Ukubwa2,NoZero,Mishale6,juukweli; yaxis,ymin,ymax,Tickslaxis,Hatua1.0,Ukubwa2,NoZero,Mishale6,juukweli;f1 halisix halisikurudi -6dhambixpi6;choragrafuf1,-6.25,6.25,upana wa mstari1;klipuxmin,ymin--xmin,ymax--xmax,ymax--xmax,ymin--mzunguko;asyThamani ya gg-1 ni ipi?  <response>: Pointi -1,3 iko kwenye grafu, ambayo inaonyesha kuwa g-13.Pointi 3,-6 iko kwenye grafu, ambayo inaonyesha kuwa g3-6.Hivyo, gg-1 g3 -6. 