so the angle in this case is that and in this case is that and in this case is that so you look at the slope here and the slope is basically the gradient of these linearized functions and what you want to do is you want to look at the correlation between those of the different data points so here you have three angles one is very short one is very bit longer like this and or no even like this and one is even over ninety degrees like that they are not correlated at all right they're all very different however the angles here they're all