How can I figure out what the forward current and forward voltage will be for an LED given a resistor size
Here is the old-school load-line method:

The straight red line represents the resistor current at Vled from 1.6V (11.06mA) to 3.26V (0mA)
Note: 11.06mA = (3.26V-1.6V)/150\$\Omega\$ -- if the graph started at 0V the Y axis for the resistor load line would only depend on the 3.26V and the resistor value. But it doesn't so it's a bit more complex.
Where it intersects the LED Vf curve will be the current through the LED. Looks like a whisker over 5mA (typical).
Note also that the scale on the X axis is wrong- it should go up by 200mV steps and it skips over 3.2V! Very sloppy.