Answer:
PR = 10
Step-by-step explanation:
PR = 
The coordinates for P and R are (0,4) and (-6,-4) respectively.
So you plug in the values:
PR = 
PR = 
PR = 
PR = 
PR = 10
Answer:
13655.90016
Step-by-step explanation:

Answer:
3y
Step-by-step explanation:
The formula is y=0.5m+20
You start (0,20) then for each mile you increase by 0.5.
Or
Since the x axis is by two, then every two miles you increase by 1 mile. So (0,20); (2,21); (4,22); (6,23); (8,24).