Period & Frequency Jan 2014 | Page 8

Page 2 of 3 x-axis Height of wave 1 Height of wave 2 Height of wave 1 + wave 2 (blocks) (y-axis blocks) (y-axis blocks) (y-axis blocks) 5 3.3 2 6 3.7 0 7 3.9 –2 8 4 0 9 3.9 2 10 3.7 0 11 3.3 –2 12 2.8 0 13 2.2 2 14 1.5 0 15 0.8 –2 16 0 0 17 –0.8 2 18 –1.5 0 19 –2.2 –2 20 –2.8 0 21 –3.3 2 22 –3.7 0 23 –3.9 –2 24 –4 0 25 –3.9 2 26 –3.7 0 27 –3.3 –2 28 –2.8 0 29 –2.2 2 30 –1.5 0 31 –0.8 –2 32 0 0 23.3