Question

Can someone explain to me what type of graph this is?
I'd like to know:
1.) What graph is this?
2.) How would you determine the answer to the question/how would you read this graph?

Explain the filled in circle, the line, and the non-filled in circle, etc.
Thanks​

Answer 1

Answer:

i can tell you why they got nine. In Abc Cabs they had 10 dollars for 5 miles. In the other one it had 8 dollars for 5 miles. Find the average. 10+8 then divide by 2