Continuous PDF Recall that X is continuous if there is a function f(x)(the density) such that P(X≤t)=fx()dx We generalize this to two random variables. 3Continuous PDF • Recall that 𝑋 is continuous if there is a function 𝑓(𝑥) (the density) such that 𝑃(𝑋 ≤ 𝑡) = 𝑓𝑋 𝑥 𝑑𝑥 𝑡 −∞ We generalize this to two random variables. 3