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.
1 Again, these symptoms can be cause by injury to the spinal cord or nerves. If these symptoms are present, then you should have further evaluation.  It is important that neck pain accompanied by these symptoms, as well as nausea, vomiting, loss of appetite, fevers, chills, or sweats, be further evaluated.