So the point where the line meets the terminal potential difference axis, (the y-axis intercept) is the EMF of the cell. At the point where the line meets the current axis, (the x-axis intercept ...

The constant term in the equation (the + 1 or ‒ 2) shows the point where the graph crosses the \(y\)-axis. This is known as the \(y\)-intercept and is represented by the letter \(c\) in \(y = mx ...