How Do You Convert Grid Units to Miles in Geometry?

[Devinnator]

What had to be plotted:
Ill just say what's needed for this problem
S (swimming pool. (-3,-1)
P (picnic. (2,2)
Ok here are the instructions: Each Grid represents 1/10 of a mile.

Question)
How far is it from picnic area to the swimming pool? Give your answers in grid units and in miles.

i keep getting 5 and 4/5 i don't know how to change that to miles and please if someone can check if that's right in the first place

 

[0rthodontist]

Use common sense:
If ONE grid unit is ONE-TENTH of a mile,
How much is:
2 grid units?

3 grid units?
4 grid units?
1039 grid units?

5 + 4/5 grid units?