Flat lines, sloped lines, curvy "lines" - the only way to tell the difference is by getting enough data to make a solid CLAIM based on EVIDENCE that you collect.
So we need to take a look at that T vs L graph a bit more - is it a curve or not? Should we graph it versus the square root of L or just plain L? We need a bigger pendulum!
Then we'll share some data and work on researching other, um, research about pendulums, and figuring out why this sciencey stuph might actually matter in real life.
(and of course, try using our mathematical model to make some predictions!)
(and what is a squirtle?)