Fade image to white

[Thorski]

I am trying to get background images for a PPT and need the image to fade from solid or nearly solid white on the left to no white about mid 16:9 image (I am overlaying blue text). I keep trying various combinations of settings, but the best I can do still ends up with a discernible edge at the end of the fade. Or, there is a thin white line near the end  of the fade.