An art teacher has $80 to spend on museum tickets for her students. Admission tickets cost $10 per student. The graph shows the linear relationship between `y`, the amount of money remaining for tickets, and `x`, the number of students going to the museum. The art teacher plans to spend all of the money on admission tickets. Which set best represents the domain of the function for this situation?
The cost of admission tickets is \$10 per student. So, the number of students must be a whole number (non-negative integer).
x = 1, 2, 3, 4, ...
The number of students cannot be less than 0 and can be at most 8 since the teacher has $80 to spend on tickets. Thus, the correct set representing the domain of the function is:
{0, 1, 2, 3, 4, 5, 6, 7, 8}