The graph of g is parallel to the graph of f, then .
Now find b.
You can use the point-slope formula to solve this one too. You must be covering point-slope formula in your book at the moment, eh?
You have been given a point and the slope of the line. They're not given explicitly, but you do have all the information you need. If you have a given line, and you know a second line is parallel to this line, then you know the slope of the second line. (Why?)
Using the point you are given, and the slope, use the (what I am sure must be familiar to you by now) point-slope formula:
red dog told you: "g(x)= ax+ b" (the general form of any linear equation) , "g(4)= 4a+ b= 1 (you were given that), and "a= 3" (because wo parallel lines have the same slope).
Replace the a in the 4a+ b= 1 by 2: 4(3)+ b= 12+ b= 1. Can you solve 12+ b= 1 for b?