Answer: $10
Step-by-step explanation: In the given equation, y = 2x + 10, we can substitute x = 0 to find the Y-intercept:
y = 2(0) + 10
y = 0 + 10
y = 10
Therefore, the Y-intercept of the equation y = 2x + 10 is 10. This means that the cost of joining the Movie Night Movie Club, regardless of the number of movies rented, is $10.