Given:
The objective is to find the weight of seal 2, after 6 months.
From the given table, difference between each weight can be calculated as,
[tex]\begin{gathered} 12.5-10=2.5 \\ 15-12.5=2.5 \\ 17.5-15=2.5 \end{gathered}[/tex]
Thus, the common difference between weight of each month is 2.5.
The weight of seal 2 after 4 month is, 17.5 pounds.
Then, after 5 month,
[tex]\begin{gathered} 5\text{ month=17.5+2.5} \\ =20\text{ pounds} \end{gathered}[/tex]
After 6 month,
[tex]\begin{gathered} 6\text{ month=20+2.5} \\ =22.5\text{ pounds} \end{gathered}[/tex]
Hence, the weight of baby in
