HELP! titration graph between strong acids and bases!?

the given are : 12.5 mL of 0.500M HBr titrated with 50 mL of 0.125M NaOH... problem is, i don't get it, when i compute for the excess moles, they don't have one! they both have 6.25x10^-3 moles and i don't get how to make a titration graph with this, will the titration graph be straight or something?!... please help me! >.<