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 Pain & Headache. Tension headaches may cause pain in the temples, in addition to neck and shoulder pain. Head and neck pain are among the more common types of pain conditions. Some types of neck pain and headaches are acute, or caused by injury or a temporary condition.