SHM Graphs

Released from $\relax x = A$, the block's x-t graph is a cosine:

$$x = A\cos\left(360^\circ \cdot \frac{t}{T}\right)$$

x-t: released at x = A, the block is back at A after one period, $2\ \mathrm{s}$.

Peak height: the amplitude. Peak to peak: the period.

The velocity is zero at the turning points and largest where the block passes equilibrium.

v-t: the speed is zero at the ends (t = 0, 1, $2\ \mathrm{s}$) and largest at x = 0 (t = 0.5, $1.5\ \mathrm{s}$).