Final answer:
The transition word 'nevertheless' effectively connects the last sentence with the previous statements, indicating further addition to the help being offered.
Step-by-step explanation:
To link the last sentence of the passage to the preceding sentences, nevertheless is an appropriate transition word. This word indicates that despite all the previous offers to help with the scatterplot activity, there is still more to add, as demonstrated by Marie's offer to assist. It establishes a sense of continuation and addition to the assistance being offered for the scatterplot activity.