Eigenvectors of points on a straight line PCA1 and PCA2

let immagine that I have 3 points and they are all on a sloped straigh line such as (-4, -2) (0,0) (2,1) this is straight line passing from the origin. Intuitevely pca2 would be 0 as I have not up spread in the data. And PCA1 would be the max variance of the data on the line. Is my intuition correct for pca2 = 0? is there any intuitive way to calculate PCA1 for this case scenario?