Question

1. Input, X 8 4 2 8 Output, yl-4-20 24

Answer 1

Remember that

The relation is a function , if for one value of x there is only one value of y

In part 1

we have that

For x=4

y=-2 and y=2

so

For one value of x there is two values of y

that means------> it's not a function

In part 2

we have that

for one value of x there is only one value of y

so

It's a function