CAN SOMEONE HELP I need this answer but cant figure it out

The domain is the input values, which are the values under the letter x.
The answer is B. 4.3, 4.4, 4.5, 4.6, 4.7
Answer:
B
Step-by-step explanation:
Domain of set of ordered pairs (x,y) is the set of 1st number of x coordinates in every pair
therefore, domain is 4.3, 4.4, 4.5, 4.6, 4.7