What type of graph is this? 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 34.5 39.5 44.5 49.5 54.5 59.5 64.5 69.5 74.5 79.5 84.5 89.5 94.5 99.5 cumulative relative frequency polygon O frequency histogram cumulative frequency polygon frequency polygon relative frequency polygon