stat_smooth（method ='lm'）不显示

Question

我想在我的绘图上显示stat_smooth（method ='lm'）线，但它不显示我所做的任何事情...请帮助...

{
  "Assessment": {
"AssessmentContext": {
    "ReportID": "1021060",
    "ReportName": "John Smith",
},
},       

"Assessment": {
        "AssessmentID": "0",
        "AssessmentItems": [{
                "ItemName": "A",
                "Value": "N"                    
            }, {
                "ItemName": "B",
                "Value": "A"                    
            }]
}