Question

The total cost of tickets in an exhibition is expressed by the function y = 5x + 4, where "x" is the number of tickets and "y" is the cost. Find the input and corresponding output values of the function assuming no nil attendance.

Answer 1

If no nil attendance, x must be a positive integer: x ∈ {1,2,3,…}.

For each input x the output is y = 5x + 4. The first few pairs are:
- x = 1 → y = 5(1)+4 = 9
- x = 2 → y = 14
- x = 3 → y = 19
- x = 4 → y = 24
- x = 5 → y = 29
…and generally (x, y) = (x, 5x+4) for x = 1,2,3,… .