Simply put:


If it's Jags +5.5


You add 5.5 points to the Jaguars score.


Meaning if they score 14, the spread increases that score to 19.5

If they score 0, the spread increases that score to 5.5

 

Let's say Sunday, the Dolphins score 24 points.  That means if you bet on the Jags, you need them to score at least 19 points.  

Now let's say Sunday the dolphins score only 10 points.  That means if you bet on the Jags, you need them to score at least 5 points.


On the other hand... let's say you bet on the Dolphins.  If the Jags score 7 points, the Dolphins need to score at least 13.

If the Jaguars score 24 points, that means the Dolphins need to score at least 30.

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