Does the graph below suggest anything about the nature of the relationship between systolic blood pressure and gestational age? If so, what does it suggest?

O 80- O O OO CD OCD C ooo 60- O CID systolic blood pressure O OO 10- o o o o O R2 Linear = 0.079 20- 22 24 26 28 30 32 34 gestational age Figure 1. Scatterplot of gestational age and systolic blood pressure