There are 5 observations in the data:
Y X1
11.4 70
11.1 86
13 45
0.8 44
7.3 75

Standardize X1 using the z-transform (subtract the mean and divide by the standard deviation). Report values for Z1, which are the standardized values for X1. Now, consider the following regression:
y = β0 + β1z1+ ϵ