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Four puzzles that were manufactured contained a total of 420 pieces. The next 6 puzzles contained a total of 630 pieces. If the relationship between the number of puzzles and the total number of puzzle pieces continues to be proportional, which could be the missing entries in the table?

Number of Puzzles
(x)
Number of Pieces
(y)
4
420
6
630

8 puzzles and 800 pieces
8 puzzles and 840 pieces
10 puzzles and 1,000 pieces
10 puzzles and 1,200 pieces

The answer is B- because if you subtract 630 from 420 you will get 210 then you know you're adding by 210 then 630 plus 210 is 840 so overall it is 8 puzzles and 840 pieces