Here's where our strategy list comes in. Notice that a low pair is #9, while four to an outside straight is #10. The low pair is higher on the list, so we hold the pair. In fact, you almost always hold pairs in Jacks or Better. We'll discuss exceptions below, but in general, always lunge for a pair, and then do a quick check to see if you have anything better, since you probably won't.
Often when you hold four cards and throw away one, the new card is the same value as the one you threw away. For example, let's say you have 9, 9, 2, 2, 5, you throw away the five, and then you get another five. This might seem to happen way more often than it should. But that's an illusion caused by the human tendency to look for patterns. A good example of how easily our perception can be fooled is to take the awareness test, where you watch a short video and count the number of passes the white team makes. Most people fail. I did.
Winning a slot machine jackpot is based solely on luck. You put your money in the machine, hit the spin button and hope that Lady Luck will invite you to dance. There are no decisions to make that will change the outcome of the spin. On the other hand, many table games require skill and the decisions you make can determine whether you win or lose. Most table games when played properly have a lower house edge than the slot machines. Knowledgeable Blackjack players know that learning basic strategy will reduce the house edge to less than one percent.
Obviously, the more you bet, the more you will win for any given hand. With one exception, the win for any given hand and bet is proportional to the amount bet. However, notice that for a royal flush the win is 1000 for a bet of four coins and 4000 for a bet of 5 coins. The disproportionately high payoff of 800 per coin bet for a royal flush, with a five coins bet, is what economists would call an economy of scale. You will see this in almost every video poker game. If you don't bet the maximum number of coins, the cost of being short-changed on a royal amounts to about 2% of money bet, which is a lot. The wise video poker player will always bet max coins per hand.
A straight is a hand with consecutive ranks, like 9? 7? 10? 8? 6?. Notice again that the cards don't have to appear in order. The order of face cards, from lowest to highest, is Jack, Queen, King, Ace, which we abbreviate J, Q, K, A. An ace can also count as 1, to complete a straight where the other cards are 2, 3, 4, and 5. But it can't count as both a low and a high card, e.g., Q K A 2 3.