Ineed with 1-6. we had a substitute today and they didn’t explain what to do and i’m completely lost someone me

A function means that each x value has only one y value. 
1. Function; Domain: -3, -1, 0, 1; Range: -5, 1, 4, 7
2. Not a function; Domain: 1, -1, -2; Range: -2, 2, 4, 3

To make an equation, you have to find the difference in y divided by the difference in x.
3. y=-8/3x+1/3
4. y=5/3x

To find the y intercept, make x into 0 and to get the x intercept, make y into 0.
5. x intercept: (7/2,0)
    y intercept: (0,-1)
6. x intercept: (9/2,0)
    y intercept: (0,6)

It’s 8.99 for john hub b