Question

Which relation is a function of x?

O
X
y
-1 7
223
X y
-8 -9
-8
2
1
1
X
-5
-5
-5
-5
8
-4
X
-9
2
y
1
7
-9
2
y

Answer 1

Answer: Option 4

Explanation:

Each value of x maps onto only one value of y.