Final answer:
On a number line, -1 is to the left of 7/10 because negative numbers are to the left of positive numbers.The correct option is A.
Step-by-step explanation:
The position of -1 and 7/10 on a number line can be determined by understanding their values in relation to zero. On a number line, numbers to the left are smaller (more negative) than numbers to the right. Given that 7/10 is a positive number and -1 is a negative number, -1 would be positioned to the left of 7/10. Therefore, the correct answer to the question is:
a) -1 is to the left of 7/10