Answer:
f(x) = -2x for x < 1
f(x) = -2 for -1 ≤ x ≤ 3
f(x) = x + 1 for x > 3
Explanation:
The upper left part is a line with slope -2 and y-intercept 0.
The bottom part is y = -1.
The upper right part is a line with slope 1 and y-intercept 1.
f(x) = -2x for x < 1
f(x) = -2 for -1 ≤ x ≤ 3
f(x) = x + 1 for x > 3