Question

how can you tell if a line of a graph has all domains that are real numbers?

Answer 1

see it says http://goo.gl/LLruLj how do I know?

Answer 2

@Luigi0210 @primeralph

Answer 3

if the lines are straight, than means their domains are all real numbers?

Answer 4

or does all types of lines have domains of all real numbes

Answer 5

you would need to look at the equation of each line. then determine if there is any restriction on the x variable.
if there are no restrictions then your domain will be all real numbers

Answer 6

if it is continous on an interval of \({(-\infty,\infty)}\)

Answer 7

then does it have all domains of real numbers?

Answer 8

I worded that weird

Answer 9

looks like blue and red are just segments

Answer 10

oooooh i see so only p(x)

Answer 11

right? @SolomonZelman

Answer 12

???

Answer 13

Never has a jump of discontinuity.

Answer 14

um ok

Answer 15

p(x) yes