Okay this is the last question of the lab and I don't get it Basically its a lab where we find how amplitude, bob mass, and length affects the period T for each time. Our finding was that length affects the period a lot. I did a bunch of graphs and tables and answered all the questions but don't know how I derive this the question is "From your graph of T^2 vs. L determine a value for g." T here is the period in seconds and L is the length of the string in cm. Now I do have to graph and it looks pretty normal to me. The slope is 0.03900 and the r is 0.9947 now I dont think this would help much at all (unless its r-slope haha...) I have to find g from this graph and calculate the percent of error I know how to calculate the percent of error but I don't know how I can find g from this graph the points are for x which is length 50 60 70 80 90 100 and for T^2 i have 2.2831 2.4586 2.89 3.3562 3.7288 My first guess was i need to find an equation for this relationship and then use the formula 4pi^2/g x L = T^2 but I don't know what to do? plug in what for L? someone please help!