Question 1051015
Please REpost with Data Clearly showing x and y values
For ex:
I. Generally, using data given and an Excel spreadsheet:  a Scatter Plot/ showing trend line and R^2 is done
Here R is  significantly different from zero as well as is the slope of the trend line, m = 2.57
  *[illustration 1031_SP]
c. the 95% confidence interval for the slope. 
•Compute margin of error (ME): ME = critical value * standard error 
Use Calculator or Excel to find the critical value(generally 1.96 for 95% confidence interval of a very large sample size)
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standard error can be found using Data and in Excel: STEYX function
In this example, SE = 4.7
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In this ex: n = 10 (Degree of Freedom (n-2)
critical value t = 2.3 Use Calculator or stattrek.com
ME = 2.57 ± (2.3)(4.7)
ME = 2.57 ± 10.81

-8.24   < m < 13.31
Hope this helps:
Here's a great summary with an ex, as well.
stattrek.com/regression/slope-confidence-interval.aspx