Analytics Software

Hi,

I am trying to draw best fit line over two points using the formula y=mx+c.

I have the following data,

consider x=68, y=23 and a=82, b=30

I interchanged the above values and form the points to plot

basically using the above (x,y,a and b) I constructed (x,y),(a,y),(x,b) as points to plot.

68,23 (x,y)
82,23 (a,y)
68,30 (x,b)

I created a scatter chart based on the value, Now I want to draw the line only between (a,y) and (x,b).

Is this achievable using any other chart or ways?

Any help highly appreciated.

Thanks,
Vino