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.
Another common disorder that can cause head and neck pain is temporomandibular joint disorder, or TMJ. Both of these conditions tend to cause a variety of other symptoms. Along with headache and neck pain, the Mayo Clinic reports that TMJ may be accompanied by jaw pain and difficulty with jaw movements.