The graph below shows the cost of a taylor swift concert ticket according to customers age. How much does the ticket for the Taylor Swift concert cost for an 18 year old fan.

Answer:
Hi there!
Your answer is:
It costs 15$ for an 18 year old fan!
Step-by-step explanation:
This is due to the fact that the line y = 15 has a shaded in circle as an endpoint. When an endpoint is shaded, we know that THAT is the actual value.
Hope this helps!