The phrase "next graph" refers to the following or upcoming visual representation of information, data, or statistics. It suggests that there is another graph or chart that will be presented after the current one. Full definition
Next graph shows the 1999 and 2015 versions overlain at the same scale, and normalized to 1910 - 1920. (climatism.blog)
This next graph is an update of one from Mortgage News Daily that I've run a number of times over the last couple of years, comparing the amount of mortgage refinancing (yellow) with mortgage interest rates (blue): (businessinsider.com)
And mortgage refinancing has been one of the most important reasons why the economy has continued to move forward in the last few years, despite the stagnation in real wages, which is what is show in this next graph of average hourly wages divided by consumer prices to give us «real hourly wages»: (businessinsider.com)