Question

Are these answers right

Answer 1

1. Which set of ordered pairs in the form of (x, y) does not represent a function of x?
{(1, 1.5), (2, 1.5), (3, 1.5), (4, 1.5)}
{(0, 1.5), (3, 2.5), (1, 3.3), (1, 4.5)}
{(1, 1.5), (–1, 1.5), (2, 2.5), (–2, 2.5)}
{(1, 1.5), (–1, –1.5), (2, 2.5), (–2, 2.5)}
my answer: My answer: {(0, 1.5), (3, 2.5), (1, 3.3), (1, 4.5)}

Answer 2

2. What is (are) the apparent x-intercept(s) of the function graphed above?
http://assets.openstudy.com/updates/attachments/525c4efee4b002bdb090883c-samanthagreenfield-1381781276728-sammiesgraph.png
my answer:
–4, –2, and 6

Answer 3

@hartnn @zepdrix @dan815 @triciaal @DanJS @jabez177 @Miracrown

Answer 4

@sleepyjess

Answer 5

2 is correct, let me go over 1

Answer 6

I'm not sure what a function of x means. Do you know another way to say that?

Answer 7

hold on

Answer 8

you have a function when there is only one y value for any given x value

Answer 9

No...that is how the problem is typed.

Answer 10

it has does not in bold.

Answer 11

Remember that a function is a set of ordered pairs in which no two ordered pairs that have the same first component have different second components. This means that given any x, there is only one y that can be paired with that x

Answer 12

So you guys are saying I am wrong?

Answer 13

my answer: My answer: {(0, 1.5), (3, 2.5), (1, 3.3), (1, 4.5)}

does not follow that, you have two points with x=1, and that has 2 different y values

Answer 14

in other words, there is a vertical portion of the graph

Answer 15

oh it says does NOT, yeah that is right

Answer 16

you are correct

Answer 17

alright thanks