Which number is farthest from 1 on the number line? $$ \sqrt{1.2} $$ $$ \sqrt{1.3} $$ $$ \sqrt{1.4} $$ $$ \sqrt{1.5} $$

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1. We compare the following numbers:  
   $$
   \sqrt{1.2}, \quad \sqrt{1.3}, \quad \sqrt{1.4}, \quad \sqrt{1.5}
   $$

2. Notice that for any number $$ x > 1 $$, the distance from $$ 1 $$ is $$ \sqrt{x} - 1 $$.

3. Since $$ \sqrt{x} $$ is an increasing function for $$ x > 0 $$, the larger the $$ x $$ is, the larger $$ \sqrt{x} $$ will be. Therefore, the number with the largest $$ x $$ will be farthest from $$ 1 $$.

4. Among $$ 1.2 $$, $$ 1.3 $$, $$ 1.4 $$, and $$ 1.5 $$, the largest number is $$ 1.5 $$.

5. Thus, the number farthest from $$ 1 $$ on the number line is:
   $$
   \sqrt{1.5}
   $$
The number farthest from 1 on the number line is $$ \sqrt{1.5} $$.

Which number is farthest from 1 on the number line? \( \sqrt{1.2} \) \( \sqrt{1.3} \) \( \sqrt{1.4} \) \( \sqrt{1.5} \)

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