Question 1188535
unfortunately, you don't have 12 blood pressure readings.
you only have 9.
i did an analysis with the first 9 pairs, using the regression tool at <a href = "https://www.statskingdom.com/linear-regression-calculator.html" target = "_blank">https://www.statskingdom.com/linear-regression-calculator.html</a>


the results are shown below:


there's lots of information in the output.
what you probably want to concentrate on is the following:


regression line is y = 64.3478 * x - 284.6957.
p-value = .0003 which is < than .05, indicating the results are significant.
r^2 = .9278, indicating that most of the data results from the relationship between the variables.
r = .9632, indicating a strong positive relationship exists.


<img src = "http://theo.x10hosting.com/2021/121202.jpg" >


<img src = "http://theo.x10hosting.com/2021/121203.jpg" >


<img src = "http://theo.x10hosting.com/2021/121204.jpg" >


<img src = "http://theo.x10hosting.com/2021/121205.jpg" >


when you find your missing data, you can run the regression calculator yourself, although i doubt, from what is already there, that the results will be different.
however, just to be sure, i would run the analysis with the missing data, and i recommend you do the same.