GR: Y1=0.5X^4–4X^2+8 en Y2=Y1(X)–Y1(X–1); table with step size $\mathrm{0,5}$ from $x=-3$.

$\langle 0,1\rangle$

Three sign changes in the increments.

Around 3:00 pm.

No, not exactly, the measurements were done hourly only.

Make a table for $D$

Decreasingly decreasing, the negative increments become smaller.

The increments approach zero. The graph of $N$ has a horizontal asymptote.