Okay so lets start by breaking this down and writing a smiple equation to find the area.
We know that the N's are the same size. To make it easier we can turn them to a square/rectangle. I think it would be easist to move the bottem N's to the top. (look at the pic attached to see what i mean)
Lets start by finding the area of the top rectangle. We need to divide 8 by 2 to find the height.
This equation is written in slope-intercept form of Y=MX+B. The M is the slope and the B is the y-intercept. The M in this equation is 3. And the B is the 1.