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i am given data for analysis following data:relationship between height and weight,question is :is relationship between them linear?like $y$=$a$+$b$*$x$+$e$ where e is error,or quadratic?or cubic?data is following(y denoted height, x-weight)

y   x 170 65 167 55 189 85 175 70 166 55 174 55 169 69 170 58 184 74 161 56 170 75 182 68 167 51 187 85 178 62 173 60 172 68 178 55 175 65 176 70 

i have calculated a and b and get following result

y=139.6155237+0.5308912572*x 

i dont know how to calculate e?or what me result means?please help me how to find e and how to check correctness of my work

EDITED: i have edited my work,i am sure it is correct,what  now should i do? 
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    Is this only part of your data?2012-04-10
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    not but others are like gender,age and BMI2012-04-10
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    Yes, coefficients are correct now. What is your task? To estimate the model and find residuals?2012-04-10
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    yes exactly,i have put x variable but have not got exact y value,so is it not linear yes?2012-04-10
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    That is fine, your model can't be perfect. The difference that you get is residual (-4.12 first data point, -1.81 second etc.). Again, try to plot your data. It is hard to tell whether the relationship is linear, there are too few observations, but linear model, in my opinion, is the best choice here.2012-04-10
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    ok i will try to do it and in case of any questions,i will post here2012-04-11

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