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.
When the neck muscles are tight they give you pain in the neck, can cause headaches, they connect to muscles going around the head that they can pull into pain for the headache, cause the sinus problems and sore throats. When your neck muscles are tight they are restricting the blood from leaving the head.