A carrier bag can hold at most 24 kg. A packet of rice weighs 3 kg and a packet of flour weighs 4…

Step 1. The intercepts. Put $y = 0$: $3x = 24$, so $x = 8$. Put $x = 0$: $4y = 24$, so $y = 6$. The line joins $(8, 0)$ and $(0, 6)$.

Step 2. The load. $3(2)\ \text{kg} + 4(3)\ \text{kg} = 6\ \text{kg} + 12\ \text{kg} = 18\ \text{kg}$.

Step 3. Is it allowed? $18\ \text{kg}$ is less than $24\ \text{kg}$, so the point $(2, 3)$ lies in the region and the load is allowed.