Final answer:
The absolute increase in population is 1800 and the relative increase is 57.14%.
Step-by-step explanation:
To find the absolute increase in population, we subtract the initial population from the final population. So, the absolute increase is 4950 - 3150 = 1800.
To find the relative increase, we divide the absolute increase by the initial population and then multiply by 100 to get the percentage. So, the relative increase is (1800/3150) * 100 = 57.14%.
Therefore, the correct option is Option 3: Absolute and Relative Increase.