For the displacement-time graph shown in the | vedclass

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(C) The slope of a displacement-time graph represents the velocity.For the first $2 	ext{ s}$ (from $t = 0$ to $t = 2$): The displacement changes fro

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$2 : 1$

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(C) The slope of a displacement-time graph represents the velocity.For the first $2 	ext{ s}$ (from $t = 0$ to $t = 2$): The displacement changes from $0$ to $20$. Magnitude of speed $v_1 = \frac{|\Delta x|}{\Delta t} = \frac{20 - 0}{2 - 0} = 10 	ext{ units/s}$.For the next $4 	ext{ s}$ (from $t = 2$ to $t = 6$): The displacement changes from $20$ to $0$. Magnitude of speed $v_2 = \frac{|\Delta x|}{\Delta t} = \frac{|0 - 20|}{6 - 2} = \frac{20}{4} = 5 	ext{ units/s}$.The ratio of the magnitudes of the speeds is $\frac{v_1}{v_2} = \frac{10}{5} = 2 : 1$.

For the displacement-time graph shown in the figure,the ratio of the magnitudes of the (constant) speeds during the first two seconds and the next four seconds is

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