anonymous
  • anonymous
A set of data points has an equation of = -1.5 + 2.5x. What is the residual for the point (5, 12)? A. 1 B. -1 C. 11 D. 12
Mathematics
katieb
  • katieb
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jim_thompson5910
  • jim_thompson5910
when you plug x = 5 into -1.5 + 2.5x, what do you get?
anonymous
  • anonymous
@jim_thompson5910 When i id it befor it didnt work and said it was wrong
anonymous
  • anonymous
did*

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jim_thompson5910
  • jim_thompson5910
what result did you get
anonymous
  • anonymous
11
anonymous
  • anonymous
C
jim_thompson5910
  • jim_thompson5910
the point given is (5,12) the observed y value is 12 the predicted y value you got is y-hat = 11
jim_thompson5910
  • jim_thompson5910
\[\LARGE \text{residual} = (\text{observed y}) - (\text{predicted y})\] \[\LARGE \text{residual} = (y) - (\hat{y})\] \[\LARGE \text{residual} = (12) - (11)\] I'm sure you see how to finish up here
anonymous
  • anonymous
So it is 1
anonymous
  • anonymous
the Large text is weird looking
jim_thompson5910
  • jim_thompson5910
yes the difference between what reality is and what the predicted value is
jim_thompson5910
  • jim_thompson5910
sorry I probably went too big lol
anonymous
  • anonymous
it is ok =3

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