To position the numbers -4.3 and -7.9 on a number line:
-4.3 would be to the right on the number line.
-7.9 would be to the left on the number line.
-4.3 is greater than -7.9 on the number line.
This is because, on the number line, numbers that are less than zero (negative numbers) are positioned further left as they decrease in value, making -4.3 closer to zero than -7.9.