Question

A golf driving range is charges a flat fee of $20 to practice and then $5.75 for a bucket of balls write an equation the models the charges in terms of the numbers of buckets of ball that you use.

Answer 1

cost=flatrate+buckets

flatrate=20
buckets=5.75 times number of buckets
let's say we use b as number of buckets

cost=20+5.75b
or
C(b)=5.75b+20 if you want to be fancy and use function notation