The price for each pound of tuna appears to be the same and the predicted amount of tuna that sells for 50$ is 10 pounds because every two pounds it equals 10$ so if you count in twos it would be 6 pounds =30$ and then 8 pounds = 40$ but if you divide the pattern 1 pound = 5$ so 40$+$5=45$ but if counting by twos 10 pounds = 50$