/***
##Extra credit [+10]
Visualize the relationship between age (continuous, in years) and systolic blood pressure
(continuous, mmHg) with a scatter plot. Add a linear fit. Change the marker size to very tiny.
Add a y-axis label and a title.
y axis = systolic blood pressure
x axis = age in years
Include the visualization in your MarkDoc.
Conduct a linear regression of age and systolic blood pressure
__What is the coefficient for age?__
_Answer: _
__Interpret the coefficient for age in words.__
_Answer: _
__What is the p-value for the age coefficient?__
_Answer: _
***/