Question

scatter plot help???

Answer 1

Sure, what's the Q? :)

Answer 2

http://gyazo.com/9d7806cc31865f7ac997e0f53c9e42e4

the scatter plot,


http://gyazo.com/6934b7547dd1e72ac93cbbcb55d6cf22
the question.

Answer 3

The observed values are the actual dots on the graph while the predicted values are the corresponding point on the line. The residual is the difference between these 2 values.

Answer 4

so how would i do it

Answer 5

Read the values off the graph

what is the plotted point for monthly heating cost for 25.4 degrees?

Answer 6

51.00

Answer 7

right - its on the table as well as the graph
now you cant read the cost accurately from the line so use the equation

Answer 8

but with the equation im confused. wht am i supposed to finding from the eqaution?

Answer 9

monthly cost y = -1.1 x + 90.51

replace x by 25.4 and calculate y

Answer 10

62.57

Answer 11

y = -1.1 * 25.4 + 90.51

it should come to approximately 62

Answer 12

- right that was fast

Answer 13

should i put 62 or 62.57

Answer 14

put 62.57

Answer 15

okay i did that

Answer 16

now the residual is the difference

to be honest i'm not sure which one is subtracted - I think its 62.57 - 51.00

Answer 17

okay 11.57

Answer 18

yes

Answer 19

- the cost was less than expected so that's 11.57 in your pocket - right?

Answer 20

yeah. so i did the same for the bottom question

Answer 21

would you mind helping me with another?

Answer 22

ok but i have to go in 10 minuets

Answer 23

ok illl post it fast

Answer 24

http://gyazo.com/4e0bb4449c021dd9a8ded1fd5d999089


http://gyazo.com/b36404d7b8a83242ac84bbea48fcdf30

Answer 25

predicted score for no time studying is
y = 3.83(0) + 15,68

Answer 26

so 15.68?

Answer 27

for 1 hour of study
y = 3.83 + 15.68

answer = this value - value for no stusying

Answer 28

for 12 hours of study

y = 3.83(12) + 15.68

Answer 29

so my answers are 15.68

3.84

and 61.65

Answer 30

second one is 3.83


yes

Answer 31

- other 2 are right

Answer 32

gotta go now

hoped you have learned something