Index: arms/js/analysisCostV2.js
===================================================================
diff -u -r2fa6b0fd64729c0a8dad5a752cb33b7b3caa8354 -r8937bd4751ca528ee1d88993c12af37fb038703a
--- arms/js/analysisCostV2.js	(.../analysisCostV2.js)	(revision 2fa6b0fd64729c0a8dad5a752cb33b7b3caa8354)
+++ arms/js/analysisCostV2.js	(.../analysisCostV2.js)	(revision 8937bd4751ca528ee1d88993c12af37fb038703a)
@@ -220,6 +220,7 @@
                 var option;
                 var mapValues = Object.values(monthlyCost);
                 var mapKeys = Object.keys(monthlyCost);
+                var mapKeysSize = mapKeys.length;
                 var maxValue = response.totalAnnualIncome;
                 var intervalValue = maxValue / 10;
 
@@ -271,8 +272,8 @@
                             name: '성과 기준선',
                             type: 'line',
                             data: [
-                              [0, maxValue/12],
-                              [11, maxValue]
+                              [0, maxValue/mapKeysSize],
+                              [mapKeysSize-1, maxValue]
                             ],
                             smooth: true,
                         },