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.
Signs and symptoms of neck pain may be stiffness, tightness, aching, burning or stabbing or shooting pains, pressure, or tingling. Muscles can feel sore or tense in the neck, face, or shoulders. Muscles can spasm when they go into a state of extreme contraction (e.g., after whiplash).