I have generated some data Y and would like to describe its variation as a function of some variable X. Using MS Excel, I obtained the trendline shown in the figure below which suggests that Y varies approximately cubically with X. However, I would like to omit the trendline itself (leaving only the data points marked by the blue diamonds) and describe the data qualitatively in an increasing sense. To that end, would it be accurate for me to use the following statement: the data Y increases approximately cubically with X?
