Can someone help explain this?? I'm not sure how to do this (algebra 9)

Answer: D= (2m/hr)(H)+ 5m
Step-by-step explanation:
I believe you need to write an equation representing how far away Jacob would be from home represented by the letter D. H would represent the hours spent hiking. this I would say:
D= (2m/hr)(H) + 5 miles
i would add the 5 miles because he initially started 5 miles from home to begin with.