Answer:
(a)
Explanation:
The line y = x + 1 has a solid circle at x = 2 indicating that x is valid for this value, thus
y = x + 1 for x ≤ 2
The line y = x + 2 has an open circle at x = 2 indicating that x = 2 is not part of the solution but that values greater than 2 are valid, that is
y = x + 2 for x > 2
The definition for the function is (a)