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.
The most common symptoms people with neck problems experience are: You may feel pain in the middle or on either side of you neck, but it may also extend to the shoulder and shoulder blade, or to the upper chest. If you have tension headaches, the pain often travels to the back of your head, and sometimes behind your eye or even into your ear.