Question

help me!!!!!

Answer 1

notice how each time the temp increases by 2, the number of sweaters sold decreases by ____

Answer 2

what goes in the blank?

Answer 3

do you see what I'm asking? or no?

Answer 4

8?

Answer 5

correct

Answer 6

so can you determine the equation for this data set?

Answer 7

So was that the answer for part a? I'm confused. Sorry .

Answer 8

no that's to help you get pointed in the right direction to find the equation

Answer 9

oh ok can you help me find the equation?

Answer 10

if x increases by 2, while y decreases by 8, then the slope is ???

Answer 11

I'm really confused :(

Answer 12

do you recall that slope = (change in y)/(change in x) ?

Answer 13

yes how would I find the slope.

Answer 14

well the change in y is -8 while the change in x is 2

so you divide the two to get what value?

Answer 15

-4

Answer 16

so the slope is -4

Answer 17

m = -4

Answer 18

the y-intercept is 250 because this is the y value when x = 0

Answer 19

so the equation is y = -4x + 250

this isn't the answer to part a), but it will help you determine it

Answer 20

do you see what to do next?

Answer 21

No I don't

Answer 22

you plug in x = 27

Answer 23

since you want to know the number of sweaters worn when the temp is 27 degrees

Answer 24

so I would have to solve it like y= -4 *27 +250?

Answer 25

correct?

Answer 26

yes, evaluate -4 *27 +250 to get ??

Answer 27

142?

Answer 28

yes

Answer 29

so that is the answer to part a) (of course you should show how you got it as well)

Answer 30

yaya! we got part a! Now part b?

Answer 31

what did you get for part b

Answer 32

I have nothing.

Answer 33

what happens when all points lie on the same line?

Answer 34

in terms of the correlation coefficient

Answer 35

a perfect correlation?

Answer 36

?

Answer 37

sorry, I was afk for a sec

Answer 38

yes, it's a perfect correlation

since it's negative, the correlation coefficient is -1

Answer 39

so r = -1

Answer 40

Can you help me with part c?

Answer 41

sure

Answer 42

post what you have so far

Answer 43

causation?

Answer 44

@jim_thompson5910

Answer 45

correct, a discount usually gets more people to buy since they save money

Answer 46

Thank you so much!!!!! :)

Answer 47

you're welcome