ssrs- Draw a diagonal line in a chart

I have a scatter chart.I have to compare the itemsold with theprofit made for each product Horizontal axis: Itemsold(in numbers)(1,2,3,4,5) interval=1Vertical axis: Profit(in lakhs)(1,2,3,4,5) interval=1chartdata:Values : ProfitCategory Group: Itemsoldseries: ProductI need to draw a diagonal line in the chart from (1,1) to (5,5).Please help me to achieve this.