Final answer:
Justin pays $15 more than Kane for membership fees to their respective video game libraries. This is found by subtracting Kane's membership fee of $50 from Justin's fee of $65.
Step-by-step explanation:
The question refers to the membership fees that Justin and Kane pay for their respective video game libraries. Justin's membership fee is $65, and it's clear from the function provided for Kane, y = 7x + 50, that Kane's membership fee is $50, which is part of the initial cost before renting any video games (when x=0).
To calculate how many more dollars Justin pays for a membership fee than Kane, we subtract Kane’s membership fee from Justin’s: $65 - $50 = $15. Hence, Justin pays $15 more for his membership fee than Kane does.