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Mathematics 8 Online
OpenStudy (anonymous):

Please help me find the mean. 5.39, 8.35, 3.81

OpenStudy (anonymous):

add the three numbers up and then divide by 3

OpenStudy (lstrasmann):

5.85

OpenStudy (anonymous):

so with every problem like this to find the mean all i am doing is adding the numbers and dividing them by how many they give me :)

OpenStudy (anonymous):

true!!

OpenStudy (lstrasmann):

yes thats right

OpenStudy (anonymous):

awesome thanks for the help

OpenStudy (lstrasmann):

you're welcome :D

OpenStudy (anonymous):

Anytime!

OpenStudy (anonymous):

but what does it mean to find the mode? how do i do that when they give me a set of numbers?

OpenStudy (lstrasmann):

mode is the number that comes up most often

OpenStudy (anonymous):

mode is the most repeated number within the set they gave you

OpenStudy (anonymous):

19,1,17,19,3,20,5,2

OpenStudy (anonymous):

so 19 then

OpenStudy (anonymous):

19

OpenStudy (lstrasmann):

19

OpenStudy (anonymous):

awesome thats easy enough

OpenStudy (lstrasmann):

yeah 19 is correct

OpenStudy (anonymous):

hahahaa.true

OpenStudy (anonymous):

how do i find the median?

OpenStudy (anonymous):

12,8,5,6,1,10,13,11

OpenStudy (lstrasmann):

also, there can be more than one mode for instance if there was 17,17,19,21,21 it would be 17 and 21.

OpenStudy (anonymous):

oh good to know

OpenStudy (lstrasmann):

the median is solved by putting the numbers in order from least to greatest and then finding the middle number

OpenStudy (lstrasmann):

if theres an even amount of numbers, then find the mean of the two middle numbers.

OpenStudy (anonymous):

so 1, 5, 6, 8, 10, 11, 12, 13 so 9?

OpenStudy (lstrasmann):

yes 9 is right :)

OpenStudy (anonymous):

awesomeness haha

OpenStudy (lstrasmann):

yeah math is hard but pretty fun sometimes

OpenStudy (anonymous):

well im blonde thats all i can say haha

OpenStudy (lstrasmann):

lol me too but im a smart blonde

OpenStudy (lstrasmann):

btw, any more questions?

OpenStudy (anonymous):

one sec let me see if there is anything more that confuses me k :)

OpenStudy (lstrasmann):

ok

OpenStudy (lstrasmann):

do you do online school?

OpenStudy (anonymous):

yeah its hard lol what is the mean

OpenStudy (anonymous):

i mean mode

OpenStudy (lstrasmann):

the mode is what number shows up the most in the set. (didn't i already say this? oh well.) btw, i agree with you, online school is very hard.. but it gets easier as the year goes on

OpenStudy (anonymous):

yeah haha i was just writing them down haha anyways yeah it does get easier but i just started a darn algebra class and i really have NO math experience

OpenStudy (anonymous):

how do i find out which of the following relations is a function

OpenStudy (lstrasmann):

um.. i think you have to look at if its a parabola like this kind of..|dw:1348077328689:dw| but not all crooked like mine :D

OpenStudy (lstrasmann):

idk thats what i remember but also it has to start with f(x) and the x can be any variable

OpenStudy (anonymous):

{(1,2), (1,3), (2,8), (3, 9)} {(1,2), (2,3), (3,4), (4,5)} {(3,-1), (2,3), (3,4), (1,7)} {(3,0), (4, -3), (6,7), (4,4)}

OpenStudy (lstrasmann):

let me look at that one second. lol this discussion is really long

OpenStudy (anonymous):

is is one of those as an answer so im confused

OpenStudy (anonymous):

its asking which of the following relations is a function out of the ones i put up

OpenStudy (lstrasmann):

yeah i know that and i looked up what a function is and its a rule that takes x and turns it into y like f(x) = y+2

OpenStudy (lstrasmann):

wait i just remembered how to do it

OpenStudy (anonymous):

oh ok weird

OpenStudy (lstrasmann):

looks like its the 2nd one

OpenStudy (lstrasmann):

{(1,2), (2,3), (3,4), (4,5)}

OpenStudy (anonymous):

how can you tell?

OpenStudy (anonymous):

just cause its in order is that why?

OpenStudy (lstrasmann):

because the formula would be y = x + 1 and each pair follows the formula.. not because its in order though. (BTW, can you fan me?)

OpenStudy (anonymous):

yes

OpenStudy (lstrasmann):

k my 2nd fan.. and do you understand what i said about the pairs?

OpenStudy (anonymous):

not really because im looking at another problem and it wouldnt be x + 1 the sets skips numbers too much ya know or is it different for each one

OpenStudy (anonymous):

A. { (2, 6), (3, 9), (4, 2), (3, 6) } B. { (2, 8), (3, 6), (2, 4), (0, 2) }C. { (3, -2), (4, 7), (-2, 5), (-4, 5) } D. { (4, 7), (-2, 5), (1, 3), (-2, 1) }

OpenStudy (lstrasmann):

its different for each one you have to look at the pattern

OpenStudy (anonymous):

i would assume C at first glance but not sure yet ahah

OpenStudy (lstrasmann):

for that one it isnt A thats for sure

OpenStudy (anonymous):

yeah i see thats way off

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