Example 2 Let X be the speed and let Y =g(X)be the trip duration: 180 g(X) To find the CDF of Y,we must calculate w≤列-（贤）=Example 2 ◼ Let 𝑋 be the speed and let 𝑌 = 𝑔(𝑋) be the trip duration: 𝑔 𝑋 = 180 𝑋 . ◼ To find the CDF of 𝑌, we must calculate 𝑃 𝑌 ≤ 𝑦 = 𝑃 180 𝑋 ≤ 𝑦 = 𝑃 180 𝑦 ≤ 𝑋