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Building a Bar Graph
Turn your pendulum data into a bar graph! Along the bottom, label the three string lengths: 15 cm, 30 cm, 60 cm. On the left side, label the time in seconds: 0, 2, 4, 6, 8, 10, 12, 14, 16, 18.
Draw a bar for each string length going up to its time for 10 swings. The bars should get TALLER as you go from left to right because longer strings take more time.
Looking at the graph, the pattern is obvious: longer string = more time = slower swinging. Scientists love graphs because patterns jump out at you instantly!