anonymous
  • anonymous
scatter plot help???
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
Sure, what's the Q? :)
anonymous
  • anonymous
http://gyazo.com/9d7806cc31865f7ac997e0f53c9e42e4 the scatter plot, http://gyazo.com/6934b7547dd1e72ac93cbbcb55d6cf22 the question.
welshfella
  • welshfella
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.

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More answers

anonymous
  • anonymous
so how would i do it
welshfella
  • welshfella
Read the values off the graph what is the plotted point for monthly heating cost for 25.4 degrees?
anonymous
  • anonymous
51.00
welshfella
  • welshfella
right - its on the table as well as the graph now you cant read the cost accurately from the line so use the equation
anonymous
  • anonymous
but with the equation im confused. wht am i supposed to finding from the eqaution?
welshfella
  • welshfella
monthly cost y = -1.1 x + 90.51 replace x by 25.4 and calculate y
anonymous
  • anonymous
62.57
welshfella
  • welshfella
y = -1.1 * 25.4 + 90.51 it should come to approximately 62
welshfella
  • welshfella
- right that was fast
anonymous
  • anonymous
should i put 62 or 62.57
welshfella
  • welshfella
put 62.57
anonymous
  • anonymous
okay i did that
welshfella
  • welshfella
now the residual is the difference to be honest i'm not sure which one is subtracted - I think its 62.57 - 51.00
anonymous
  • anonymous
okay 11.57
welshfella
  • welshfella
yes
welshfella
  • welshfella
- the cost was less than expected so that's 11.57 in your pocket - right?
anonymous
  • anonymous
yeah. so i did the same for the bottom question
anonymous
  • anonymous
would you mind helping me with another?
welshfella
  • welshfella
ok but i have to go in 10 minuets
anonymous
  • anonymous
ok illl post it fast
anonymous
  • anonymous
http://gyazo.com/4e0bb4449c021dd9a8ded1fd5d999089 http://gyazo.com/b36404d7b8a83242ac84bbea48fcdf30
welshfella
  • welshfella
predicted score for no time studying is y = 3.83(0) + 15,68
anonymous
  • anonymous
so 15.68?
welshfella
  • welshfella
for 1 hour of study y = 3.83 + 15.68 answer = this value - value for no stusying
welshfella
  • welshfella
for 12 hours of study y = 3.83(12) + 15.68
anonymous
  • anonymous
so my answers are 15.68 3.84 and 61.65
welshfella
  • welshfella
second one is 3.83 yes
welshfella
  • welshfella
- other 2 are right
welshfella
  • welshfella
gotta go now hoped you have learned something

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