If anyone is interested the way I got around this was as follows: The x axis values for the graph I have had to store in a new table in my data source. Then the y values will be this x value passed into my quadratic equation. I created a derived view in my domain which does a select on the x values (giving my range of values) and then calculates the y value based on my equation constants (could use a store procedure to calculate this) I then set the x value as a dimension and the y value as a measure and plot them on a graph, this gives me the quadratic equation plot.
