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.
Tension headaches are another cause of sharp pain in temple or head area, which can bring discomfort that is hard to bear. The pain is felt due to the muscle tightness that may be present in the area of the headache. Tension headaches occur when scalp muscles and neck are tense due to certain activities like too much computer work.