fix the incorrect practice graph. Also writing buffer system and (-) or (+) will not work as it has to be a valid number

EXPERIMENT 2: Fill in the following table with results found in your records. Please indicate whether the change was positive (+) or negative (-). Water, pH Water, pH after HCl Incorrect Water, change in pH Incorrect Water, pH 7 Water, pH after NaOH Incorrect Water, change in pH +6 Incorrect Incorrect NaH2PO4,pH after HCl 6.1 Incorrect NaH2PO4, change in pH +0.1 Incorrect NaH2PO4,pH 6 Incorrect NaH2PO4,pH after NaOH 7.4 Incorrect NaH2PO4, change in pH +1.4 Incorrect Incorrect Na2HPO4,pH after HCl 4.1 Incorrect Na2HPO4, change in pH +0.1 Incorrect Incorrect Na2HPO4,pH after NaOH 4.1 Incorrect Na2HPO4, change in pH +0.1 Incorrect NaH2PO4 and Na2HPO4,pH 7.4 NaH2PO4 and Na2HPO4,pH after HCl 7.3 NaH2PO4 and Na2HPO4, change in pH 0.1 Incorrect NaH2PO4 and Na2HPO4, change in pH Incorrect NaH2PO4 and Na2HPO4,pH 7 NaH2PO4 and Na2HPO4,pH after NaOH Incorrect NaH2PO4 and Na2HPO4, change in pH Incorrect EXPERIMENT 2: Fill in the following table with results found in your records. Please indicate whether the change was positive (+) or negative (-). Water, pH Water, pH after HCl Incorrect Water, change in pH Incorrect Water, pH 7 Water, pH after NaOH Incorrect Water, change in pH +6 Incorrect Incorrect NaH2PO4,pH after HCl 6.1 Incorrect NaH2PO4, change in pH +0.1 Incorrect NaH2PO4,pH 6 Incorrect NaH2PO4,pH after NaOH 7.4 Incorrect NaH2PO4, change in pH +1.4 Incorrect Incorrect Na2HPO4,pH after HCl 4.1 Incorrect Na2HPO4, change in pH +0.1 Incorrect Incorrect Na2HPO4,pH after NaOH 4.1 Incorrect Na2HPO4, change in pH +0.1 Incorrect NaH2PO4 and Na2HPO4,pH 7.4 NaH2PO4 and Na2HPO4,pH after HCl 7.3 NaH2PO4 and Na2HPO4, change in pH 0.1 Incorrect NaH2PO4 and Na2HPO4, change in pH Incorrect NaH2PO4 and Na2HPO4,pH 7 NaH2PO4 and Na2HPO4,pH after NaOH Incorrect NaH2PO4 and Na2HPO4, change in pH Incorrect