Which property is true for any PDF f(x)f(x)f(x)?
f(x)≥0f(x) \ge 0f(x)≥0
f(x)≤1f(x) \le 1f(x)≤1
∫f(x)dx=0\int f(x) dx = 0∫f(x)dx=0
It must be linear