Published jackpot odds generally describe one distinct selection in one draw. Buying more distinct lines covers more outcomes, but it does not improve the odds of any individual line.
What changes with two lines?
For a single Powerball draw, two different valid selections cover two of the 292,201,338 jackpot outcomes, so the jackpot chance is 2 in 292,201,338. Buying the same selection twice covers only one outcome; it may change how a win is paid, but not the chance of a jackpot. Across separate draws, probabilities combine differently because each draw is separate.
A ticket may bundle several lines, draws, or optional games. Count the distinct main-game selections and the actual ticket cost before comparing products. Powerball’s official odds are per $2 play; the Powerball profile lists the researched ticket basis. Browse the odds table for other games.