microsoft excel - Eliminate the appearance of a dip when plotting increasing data with smoothing

I have a data set in which Y is an increasing function of X.  Here is the data:

5  | 0.1
10 | 0.789
15 | 147.5
20 | 216.5
25 | 276.5

I create an XY (Scatter) Chart with Smooth Lines:

     

Because the first two points are very close in Y value, and not characteristic of the distribution of the other points, the smooth line option displays a 'dip' between those two points.

How can I plot this with a smoothed line that estimates the curve on which the data lie without having it include a dip?

Answer

Are you willing to manipulate (fudge) your data to get the desired chart?  I was able to add one point:

5     0.1
9.9   0.7
10    0.789
15    147.5
20    216.5
25    276.5

and the chart changed to this: