Question

Help help

Answer 1

A function will have only one output y value for any given input x value. Only one, if more then it is not a function.

Answer 2

oh so saying that #9 is no and #10 yes?

Answer 3

\[\large y=3x^2+2x-3\]
\[\large y=\pm \sqrt{x^2+2}\]

Answer 4

The first one is a parabola. Any x value you put into
y=f(x)=3x^2+2x-3

will return only one y value everytime for all possible x values.. so it is a function

Answer 5

10 will be a no because since y is squared, you must take the square root of both sides. When you do this, the right side is + or - the answer, a.k.a 2 answers so 10 will me a no.

Answer 6

for y as a function of x on the second problem, solving for y gives you both plus and minus roots, each x value will return back 2 y values ,so it is not a function