The answer is x= 4 and x= -6
If you separate those into points (0,2) and (2,4) then figure out the slope by using the equation y2-y1 divided by x2-x1, you'll get 4-2 over 2-0 which gives you 2/2 or 1. You found the slope so you can plug that into the slope-intercept equation y-y1=m(x-x1). For you, it'd be y-2=1(x-0), you end up with the equation y=x+2.
For this case we propose a rule of three:
67 grams -----------> 22%
x grams --------------> 100%
Where:
The variable "x" represents the recommended amount of daily carbohydrates.
So, we have:

Rounding we have the recommended amount, in grams, of carbohydrates: 305 grams
Answer:
305 grams