If no correlation exists between the variables, the points appear randomly scattered on the coordinate plane. If a large correlation exists, the points concentrate near a straight line. Scatter plots are useful data visualization tools for illustrating a trend. If the vertical (or y-axis) variable increases as the horizontal (or x-axis) variable increases, the correlation is positive.
Whiplash Whiplash, a severe neck injury, can cause stiffness and pain in the neck, headache, dizziness, and more. Aortic stenosis Aortic stenosis is a condition of the heart causing shortness of breath, dizziness, or chest pain.
Causes of Neck Related Headaches. There are structures in the neck can cause neck related headaches, most commonly problems with the discs or facet joints of the upper and middle part neck are often involved with injury, arthritis and postural stress, while muscle strain may add to the overall pain. Disc Problems.