Question

Now write an equation that shows that the population in year 2 is a 20% increase of the population in year 1.

a) Year 2 Population= Year 1 Population×1.2
b) Year 2 Population= Year 1 Population+20%
c) Year 2 Population= Year 1 Population÷ 1.2
d) Year 2 Population= Year 1 Population-20%
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Answer 1

The correct equation that shows a 20% increase in population from year 1 to year 2 is Year 2 Population = Year 1 Population × 1.2.

Step-by-step explanation:

The correct equation that shows that the population in year 2 is a 20% increase of the population in year 1 is option (a) Year 2 Population = Year 1 Population × 1.2.

To understand this, let's consider an example: If the population in year 1 is 100, then the population in year 2 would be 100 × 1.2 = 120, which represents a 20% increase.

So, option (a) is the equation that correctly represents a 20% increase in population from year 1 to year 2.