write an addition or subtraction equation (your choice!) to describe the diagram.

Answer:
(-4)- (-9) = -13
Step-by-step explanation:
not sure if it's right so be ware
Answer:
0-4-9= -13
Step-by-step explanation:
Going back 4 spaces from 0 is -4 then after that going back 9 more spaces is an addition to -4 of -9. Which is -13.