Answer:
y = 10x + 5
Step-by-step explanation:
The formula for slope intercept is y=mx+b
b is the y-intercept or the constant. (The amount that won't change) In this case that would be 5 because they have to play that once.
10 would be the "m" because it is PER night which means we would be multiplying by the amount of days/nights.
y would be the total and x is the days.
The equation would look like so, y = 10x + 5
Hope that helps and have a great day!