What is the average rate of change on the interval [-1,1]?

Steven Scarecrow is looking to go on a Haunted Hayride but wants to leave the kids at home with a
babysitter. He found that Casper charges $23 plus $2 per hour and Balthazar charges $15 plus $4
per hour. Write and solve an equation to determine the number of hours that Steven Scarecrow could
hire either babysitter for the same cost. *
Please help!!!

Addicts the remote hypothesis is a conjecture that the remote data function has it zeroes only at the negative even integers in complex numbers with real part half many considered to be the most important unsolved problem in pure mathematics is of great interest in number theory because it implies results about the distribution of prime numbers