Can Somebody help me?

Part 3 Graph B Part 4 Graph C Part 5 Graph A

Step-by-step explanation:

We can use the process of elimination to eliminate b because in the text it states she starts at home so she should be at 0. We next can eliminate A because it says she stops however in graph a there is no flat line to suggest a period of time with no movement. So we end up with B.

Part 4 is C because it  says she starts not at home so we look for the graph not at 0.

Part 5 Graph A is not used. In this graph she could be running 3 miles then turn around and run back those 3 miles

Hope this helped :)

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value