The slope of the line formula:

Next, you would have to plug in the coordinates.

Now, all you would have to do is solve and simplify it.

=

=
The slope would be 
.
I hope this helps!
Answer:
the first one: y=2x ²-1
Step-by-step explanation:
Plug in the "x" to the equation, so: 2(2) ²-1 = 7 which is "y" in the table above.
Answer: Sure what you having trouble with?
Step-by-step explanation: