Question

Please please someone help

Answer 1

The answer is the first one:

bc its not growing by a (-)1/2  and the 3rd one just doesnt make sense

Answer 2

The vertex form is y = x
Standard form is x + y = number
Move x to the other side
-x + y = 0
The coefficient on x cannot be negative so multiply the whole equation by -1.
x - y = 0