Question

Help! Will fan and medal!

Answer 1

Q15, which one is linear?

Answer 2

Not sure, are you supposed to input values for the numbers to sort it out?

Answer 3

no, the linear function equation will have the formula
y = mx + c, does this help? you should know what m and c are as we covered it earlier, right?

Answer 4

Ohh okay, Yeah I remember (: you've been a lot of help!

Answer 5

so which one is it her? b or c?

Answer 6

Give me a minute.. Sorry I'm slow Haha

Answer 7

B, right?

Answer 8

no, try again?

Answer 9

Shoot, so C... Hmm...

Answer 10

b looks something like the above, this is not linear, you can see how the line bends at an angle, that's because of the modulus |x|

Answer 11

why wasn't C your first answer, what didnt you like about it? the fraction before x?

Answer 12

Yeah, and when I tried to put the numbers out for B., looked linear to me.

Answer 13

m in y=mx+c can be anything, a fraction is just fine, same applies to c in this equation

Answer 14

with Q 16 plot the values on the X-Y coordinates and if you get a straight line

Answer 15

thats one way of doing it, another way is to construct the euqation from 2 or more sets of points from the table and if you get y=mx+c then it is linear

Answer 16

Not quite, right?

Answer 17

Oh hang on my graph is a bit messed up haha

Answer 18

the distance on X and Y between your values isn't right

Answer 19

X is ok now, but Y is way out of whack

Answer 20

Oh yeah, my bad. Sorry, I've been up for over 24 hours lol one sec I'll sort it out

Answer 21

between 0 and 30 u have 1 unit, then same unit is used with 45, 50 ...

Answer 22

This should be sorted(:

Answer 23

yes and that's not linear

Answer 24

q 17 do the same, draw the graph and you'll see that it isnt linear

Answer 25

Right, so it's not linear because it doesn't form a straight line when the points are plotted. Does it need any more explanation than that do you think?

Answer 26

to be on the safe side use also this explanation
the slope between the first 2 points is m = 15/100
and between the second 2 points it is m = 10/100
and between the third 2 points it is m = 5/100

in a linear function the m between any 2 points remains the same, here it is not so this is not a linear relation/function

Answer 27

Oh Okay, I am actually understanding this! thank you:)

Answer 28

am glad you can relate to it

Answer 29

Could you help me with this too? Sorry, I know I'm asking a lot, I can post a new thread if you fancy? (Just the top question)

Answer 30

yes please others will fancy that too

Answer 31

Alright, one moment (: