Question

Meg plotted the graph below to show the relationship between the temperature of her city and the number of sweaters sold at a storePart A: In your own words, describe the relationship between the temperature of the city and the sale of sweaters in the city. (5 points)

Part B: Describe how you can make the line of best fit. Write the approximate slope and y-intercept of the line of best fit. Show your work, including the points that you use to calculate slope and y-intercept. (5 points)

Answer 1

@jim_thompson5910

Answer 2

Give me your thoughts on part A

Answer 3

. You make a

Answer 4

sorry hold on

Answer 5

when the temperature in *C is higher there are less sweaters bought

Answer 6

exactly

Answer 7

so as the temperature goes up, the amount of sweaters sold goes down

this means we have a negative correlation

Answer 8

negative correlation means one variable goes up and the other goes down (or vice versa)

positive correlation means both variables go up together or go down together

Answer 9

okay

Answer 10

positive is when they go up together

Answer 11

or down together

Answer 12

yea

Answer 13

@jim_thompson5910

Answer 14

So you finished part A?

Answer 15

yea

Answer 16

i already know how you can make a line of best fit

Answer 17

i just dont know the slope and yintercept

Answer 18

Here is one possibility

Answer 19

yes that is

Answer 20

@jim_thompson5910

Answer 21

what two points lie on that blue line?

Answer 22

[5,10] and [0,12]

Answer 23

use parenthesis, not square brackets

(5,10) and (0,12)

Answer 24

what is the slope of the line through (5,10) and (0,12)

Answer 25

slope formula


\[\Large m = \frac{y_2 - y_1}{x_2 - x_1}\]

Answer 26

subtract the y values
subtract the x values (same order)
divide the differences

Answer 27

y=2 x=5

Answer 28

2,5

Answer 29

2.5*

Answer 30

@jim_thompson5910

Answer 31

am i right

Answer 32

(5,10) and (0,12)


subtract the y values
12 - 10 = 2

subtract the x values (same order)
0 - 5 = -5

Divide the differences
ydiff/xdiff = 2/(-5) = -2/5 = -0.4

Answer 33

The slope is m = -0.4

Answer 34

oh

Answer 35

I didnt do the right order

Answer 36

The slope is negative since we go downhill as we move from left to right

Answer 37

okay

Answer 38

is the y intercept 12

Answer 39

yes

Answer 40

so its y=-0.4x+12

Answer 41

I think thats it thank you @jim_thompson5910 you have helped so much i do i give you a medal

Answer 42

how do i give you a medal*

Answer 43

clicking the "best response" button gives out the medal. I'm glad I could help out