Final answer:
When all numbers are converted to decimal form, -3.1 (or -3 1/10) is the smallest number. It appears farthest to the left on a number line.
Step-by-step explanation:
To answer which number would appear farthest to the left on a number line, let's first convert all numbers to decimals for easy comparison:
-2.5 is already in decimal form.
-1.6 is already in decimal form.
-3 1/10 can be converted to -3.1.
- 1/10 can be converted to -0.1.
-0.5 is already in decimal form.
On a number line, the farthest left is the smallest or most negative number. In this case, -3.1 (or -3 1/10) is the smallest number and would therefore appear farthest to the left.
The correct answer is D. -3 1/10.