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.
There are different types of headaches. One common type is called a cerivcogenic headaches or neck-related headaches. There is lot of research coming out of the University of Queensland in Brisbane, Australia that has discovered how proper stabilization of the neck muscles can reduce neck pain, whiplash injuries, and cervicogenic headaches.