If all data points lie in a straight line on your standard curve except for one point. should you ignore the point or shift the line to connect the points

Ignore the point, the majority of the points are along the trend line.

Ignore the point, the point is an outlier and shifting the line to connect the point can alter the data dramatically especially if you're asked for the median or mean.

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.