1. The problem statement, all variables and given/known data There was this question involving a pendulum expriment: the five values of the square of the period (T^2) was plotted against the 5 values of the distance y in centimetre from the floor to the centre of the bob. I was then asked to determine the intercept on the vertical axis and slope of the graph as well; I have determined the intercept and slope of the graph. I was then asked to use the value of the intercept to determine the height H of the point of attachment of the pendulum to the floor. How do I go about that? 2. Relevant equations 3. The attempt at a solution I have gotten the intercept and the slope of the graph as well.