Help needed

tysm for everyone helping btw :)

i put points at 35 xx

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

What multiplys to be 1 but adds up to be 4