Answer:
Option A
Explanation:
The set of values for which y is a function of x is the set where each x-value has exactly on y-value. No x-value has more than 1 y-value.
✅Option A: y is A FUNCTION of x because it has exactly one y-value assigned to each x-value.
❌Option B: y is NOT a function of x because there are two y-values, 4 and 2, that are assigned to one x-value, -1.
❌Option C: y is NOT a function of x because there are two y-values, 10 and 12, that are assigned to one x-value, 1.
❌Option D: y is NOT a function of x because there are two y-values, 2 and 4, that are assigned to one x-value, -1.