The points on the number line represent 6.72, Six and seven-eighths, and 6.15.

A number line from 6 to 7. The first point is between 6.1 and 6.2. The second point is to the left and between 6.7 and 6.8. The third point is to the right and between 6.8 and 6.9.

Which shows the numbers in order from least to greatest?

6.72, Six and seven-eighths, 6.15

6.72, 6.15, Six and seven-eighths

6.15, 6.72, Six and seven-eighths

6.15, Six and seven-eighths, 6.72