hey can someone help me pls immediately!!! i’ll mark brainiest if u don’t guess or leave links. pls don’t guess tho actually know it if ur going to say the answer

Answer:
$9
Step-by-step explanation:
between 2 and 4 is 3 sandwiches.
There is a point at 3 and 9
(3,9) $9 for 3 sandwiches