I have a line chart now, I want one of them (the red line) to be dashed line. How can I do this?
There is a chart property that allows you to add a linear regression line, but it's only available in line charts with a single series.
If you want to see a trend line through multiple points you could switch to a scatter chart and put the date on the x axis. This chart type allows you to add regression lines (as a chart property) to a scatter plot. See example below.
You can't change the line to a dash line in Domo
@Jennifer, did @Godzilla's reply help you out?