Answer:
4 +2n
Explanation:
Tynessa has colored 4 red blocks in each figure. The number of blue blocks in each figure is the same as the figure number in both the top and bottom rows. That is, the total number of blue blocks is 2 times the figure number.
If the figure number is n, Tynessa might write the pattern rule as ...
number of blocks = 4 + 2n