Isibalo sekhyubhiki kugrafu

Futhi ijika futhi, nesixazululo salo simakwe. Lapho $y=0$, ijika lise-eksisi ka-x\displaystyle x: kanye kuphela, esixazululweni sangempela, −1.23\displaystyle -1.23. Lapho $y<0$, ijika lingaphansi kwe-eksisi: kwesobunxele kwesixazululo. Lapho $y>0$, lingaphezulu kwe-eksisi: kwesokudla. Okuyinkimbinkimbi ezimbili aziveli kugrafu: ijika lihlangana ne-eksisi kanye kuphela.