How does caffeine affect reaction time? | bar chart made by Z.hussain14

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Z.hussain14's interactive graph and data of "How does caffeine affect reaction time?" is a bar chart, showing Ave. reaction time before drink (s), Ave. reaction time 10mins after drink (s), Ave. reaction time 20mins after drink (s). The x-axis shows values from -0.5 to 2.5. The y-axis shows values from 0 to 0.9484210526315789.