Answer:
(4, 0)
Step-by-step explanation:

x=4 when y=0, and in x-intercepts, we are trying to find the value of x when y=0, which is why (4, 0) is the point of interception.
I think the answer might be C i hope this helps you
Answer:
.
Step-by-step explanation:
In order to solve this, we need to figure out how much ONE student spends.

dollars per student.
If 10 student spent for lunch, we just have to multiply our number by how much each student spends.
Answer:
This is a function and it's because there's only one input for every output.
Step-by-step explanation:
Note: Although 5 and 1 both point to the same number this doesn't take away the validity of the function. :)