Question

graph each equation. is it a function?
A. x=1
B. x=0
I saw the example but its werid..

Answer 1

it will be a line
so give it a try

Answer 2

Huh like idk what to do with numbers or how to do on graph

Answer 3

okay.

Answer 4

then what

Answer 5

actual eq. of line
ax+by=c
so in this if we put y=0 we find both line

Answer 6

it is not a function, because it is not one to one. Meaning that for it to be a function there needs to be a relationship such that for every x there is only one y. In this case, there are many y possibilities for 1 x. http://www.purplemath.com/modules/fcns.htm

Answer 7

i think it simple for understanding

Answer 8

\(x=1\) means "x is always 1, no matter what \(y\) is"
so all the points on the graph have a 1 as the first coordinate
the \(y\) can be any number
so you can have
\((1,2), (1,1), (1,2), (1,3),\) etc

Answer 9

lorda mercy
"one to one" is a completely separate concept from "is it a function"

Answer 10

it is a vertical like
it does not pass the "vertical line test"
because both the points \((1,2)\) and \((1,3)\) are on the graph, it is not a function
repeated \(x\) values means not a function

Answer 11

first you are not stupid, you are just not trying

Answer 12

no it is neither stupidity nor lack of trying
"functions' is a hard concept

Answer 13

every line is a function, except a vertical line
any other line will determine a function

Answer 14

well I suppose you can look at it that way, but one to one and the meaning of a function is the same in my head.

Answer 15

i still dont get it. -.-

Answer 16

x = 1 and x = 0 are two different vertical lines that have infinitely many y possibilities

Answer 17

slow
we have \(x=1\)
is \((1,3)\) on the graph? yes, because \(x=1\)
is \(1,2)\) on the graph"? yes, because \(x\) is still 1

Answer 18

how about \((1,7)\)? yes, that is on the graph also
the graph is a vertical line

Answer 19

now why isn't it a function? because for a function, the first coordinate cannot repeat

Answer 20

so if you have a graph with two points with the same first coordinate, it is not a function

Answer 21

what do you mean the first coordinate cant repeat?

Answer 22

like 1,1?

Answer 23

ok for \((1,3)\) the first coordinate is 1

Answer 24

(x,y) x being the first coordinate

Answer 25

for \((1,2)\) the first coordinate is 1

Answer 26

oh okay

Answer 27

so if i see both points \((1,3)\) and \((1,2)\) the first coordinate is repeated

Answer 28

of course its repeated x=1

Answer 29

right

Answer 30

so, where are you lost? what doesnt make sense

Answer 31

what does?