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Mathematics 14 Online
OpenStudy (anonymous):

help please!!

OpenStudy (anonymous):

OpenStudy (anonymous):

will medal :))

jimthompson5910 (jim_thompson5910):

Take note of the arrows. They indicate that the line stretches on in both directions and does so infinitely. So the line goes on forever So the range would be the set of all real numbers BUT there's a hole on the line (hopefully you're able to see it?)

OpenStudy (anonymous):

so its all real numbers?

jimthompson5910 (jim_thompson5910):

if the hole wasn't there yes, but there's a hole

jimthompson5910 (jim_thompson5910):

do you see where the hole is at? it's on the line

OpenStudy (anonymous):

thank you!

jimthompson5910 (jim_thompson5910):

the answer isn't "all real numbers" again, there's a hole

OpenStudy (anonymous):

oh okay yes i do see it

jimthompson5910 (jim_thompson5910):

where is the hole? what are the coordinates?

OpenStudy (anonymous):

4,3

jimthompson5910 (jim_thompson5910):

(4,3) is not the correct location it should be (-4,3) since you go over to the left in the negative x direction

OpenStudy (anonymous):

my negative didnt go in sorry

jimthompson5910 (jim_thompson5910):

y = 3 is the y coordinate of the hole so y = 3 is NOT a possible output, which means it is NOT in the range of the function

jimthompson5910 (jim_thompson5910):

so the range is the set of all real numbers BUT y can't equal 3

OpenStudy (anonymous):

okay

jimthompson5910 (jim_thompson5910):

if your teacher went over set notation, then you would write it like this \[\Large \left\{y|y\in\mathbb{R} \ , \ y \neq 3\right\}\]

OpenStudy (anonymous):

thank you

jimthompson5910 (jim_thompson5910):

or you can do it in interval notation \[\Large (-\infty, 3) \cup (3, \infty)\]

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