Answer:
Step-by-step explanation:
Common ratio (r) = 2nd term / 1st term = 15/3 = 5
Recursive formula:

Explicit formula:
a = first term = 3

Answer:
Domain: [1, infinity)
Range: All real numbers or (- infinity, + infinity)
Step-by-step explanation:
Hope this helps
About 17.333333 miles a day
because
The constant of proportionality is x=y/5 because its the constant that is not changing in he proportion. It represents the total of members made for washing x cars.