Sur it's a function because for each x value corresponds one and only one y value.
Another easy way to determine if y is a function is to apply the vertical test:
If you draw a vertical line and this lines intersects the graph in one point, then y is a function
Answer:
b
Step-by-step explanation:
30/6 = n
n = 5
ratio is 5:1
I can't put the whole screenshot in here
