This function has a couple of restrictions:
- y can't be less than zero, because when you have no money left you can't buy any more tickets
- x must be a positive integer, because you can't buy a negative of fractional amount of tickets.
With these constraints in mind, we can explicitly write all the possible (x,y) couples:

Where x is the number of tickets bought and y is the amount of money you're left with. So, if you buy no tickets, you still have all your $60. If you buy 1 ticket you're left with $52. If you buy 2 tickets, you're left with $44, and so on.
This table shows that the domain is the set

And the range is the set

And they are both discrete. To graph the function, simply draw all the (x,y) couples on a coordinate grid.
Answer:
$60 per ticket
Step-by-step explanation:
$215 is what it costs after the discount, so add the amount taken off, back on.
215+25
240
Then, divide by 4 to find the cost of each individual ticket.
240/4
60
Answer:
(7, -6)
Step-by-step explanation:
You will graph it at this point because the point is basically the origin and when you rotate it clockwise 90° it will end up in Quadrant IV.
Answer:
a ≈ 1.59
b ≈ 6.69
Step-by-step explanation:
Law of Sines: 
Step 1: Find <em>c</em> using Law of Sines


c = 1.59154
Step 2: Find <em>a</em> using Law of Sines


a = 6.68961