For some consecutive years I have a number of incidents in a given city. From the scatter plot I deducted that the incidents increase linearly, so I performed a Linear Regression test. The slope is about 30 degrees.
Is there a way to show that this line is increasing in time?
I guess I have to compare the slope of my line with an imaginary horizontal line (zero degrees slope).
I have found this Q&A: Test a significant difference between two slope values. In my problem, the standard errors I have are zero for both lines.