The graph of a function f(x) is shown below.

What is the domain of f(x)?

-2

Question

The graph of a function f(x) is shown below.

What is the domain of f(x)?

 -2 < x ≤ 3

 -2 ≤ x < 3

 -1 < y ≤ 3

 -1 ≤ y < 3

geekfromthefutur · Answer

attachment

phi · Answer

there is the domain and the range.  One is for the x values and the other is the y values.
any idea which is which ?

geekfromthefutur · Answer

im thinking the third one

phi · Answer

there is the domain and the range.  One is for the x values and the other is the y values.
any idea which is which ?

geekfromthefutur · Answer

sorry i meant to say the last one

phi · Answer

what does this tell you? http://www.freemathhelp.com/domain-range.html

phi · Answer

this question expects you to learn what the word "domain" means.  You could try to learn its meaning.

phi · Answer

learning a new word is not math, it is English.

geekfromthefutur · Answer

i know im sorry im not good at math i wasnt even good at math in secong grade i was held back twice

phi · Answer

yes, but what does "domain" mean ?

what does this tell you

The domain of a function is the set of all allowable values of the independent variable, commonly known as the x-values.

geekfromthefutur · Answer

oh ok yea im thinking its thew second one

geekfromthefutur · Answer

the*

phi · Answer

can you first answer the question,  does the domain refer to the x values or the y values ?

geekfromthefutur · Answer

it refers to the x values

phi · Answer

yes.  so which choices *might* be the answer ?

geekfromthefutur · Answer

most likely its got to be the first one

phi · Answer

which of the choices refer to x ?  the first 2 choices.

so the answer is either the first or second choice.

phi · Answer

to figure out which one, we look at your graph.

phi · Answer

do you see the line with the dots or circles at the end of the line?

geekfromthefutur · Answer

yes

phi · Answer

here is another thing to remember:

a filled in (solid) dot means that x can have that value.  (x = that value)
an open circle means x cannot have that value (x is not equal to it)

phi · Answer

can you read the graph and tell if x can be equal to 3 ?
in other words,  is the dot above x=3  solid or open ?

geekfromthefutur · Answer

yea its above x and its closed

phi · Answer

what that means is x can be = 3 or less than 3 
at the other end,  is an open circle.  x cannot equal -2

-2 < x ≤3

geekfromthefutur · Answer

oh ok i understand it now thank you for helping me with this iv been stuck on this for awhile cuse i didnt understand but thx (: