MAV 2009 exam 1 help please! :)

[yejiawen]

I've attached the questions that I found difficulty with...

I didn't get how they found the mid points (first and last) for the three median points. I thought it was just the middle point... the outlier got me pretty confused as well :S

Thanks

[vidang]

for the 1st question core
i got B = -2.7

you have 16 points
split them up into 3 groups
and since theres 1 left over, we know 1 left over will be added to the middle so therefore
it'll result in splitting up by (5,6,5)

find the middle point of the lower and upper

for lower
you know theres 5 points
so you count 3 across starting from left to right
and you count 3 vertically, counting from bottom then upwards find the middle, as the middle of 5 = 3
and you then do this for your upper

look at what i did (below)
after you find those two points
use gradient rule
and bam you have the answer

[yejiawen]

oooooooooh thats right! -.- mind my brain fart, I kept thinking that it was only the middle point of the horizontal. I didn't take into consideration for the mid point from the vertical! Thank you very much!

Are you also able to help me out with the other question? :S

[vidang]

i dont do trig sorry
only linear, matrices and networks