What is the slope of the regression line?

Imagine a regression line that relates average systolic blood pressure to a person's age. For this setting let the average systolic blood pressure play the role of response variable. The average blood pressure for people 22 years old is 102, while for those 34 years old the average is 126.
Recall from high school that the slope is "rise" over "run". Since this is a two point line your model will fit perfectly (r = 1).

What is the intercept of the regression line?