Question

what does a sideways 8 and the symbols [ and ( mean on a line chart?

Answer 1

[ means less than and equal to.

( means just less than.

Answer 2

so i have a [ at the seven, and a straight line pointing past the ten

Answer 3

it means, the x is greater than and equal to seven.

Answer 4

can u post the photo here?

Answer 5

with an arrow

Answer 6

yes, thts it.

Answer 7

how wopuld i write that with the sideways 8?

Answer 8

\[x \le 7\]

Answer 9

Sidways eight is
\[\infty\]
which means infinity.

Answer 10

but its better if u post a photo!

Answer 11

it depends how u need the answer.

Answer 12

x greater than or equal to seven:
\[x \in [7;\infty[ \]
Or a ) after the infinity symbol. I think the convention is [ for open interval though.

Answer 13

x >=7. Basically, x is anywhere from being equal to 7 to being however large. That's what the interval [7, inf) means.