In simple linear regression a single independent variable is used to predict the value of a dependent variable. In multiple linear regression two or more independent variables are used to predict the value of a dependent variable. The difference between the two is the number of independent variables.
Watching for Systemic Symptoms. 1  1. Watch from swollen glands. Serious cases of cellulitis will spread beyond the initially infected region to become systemic and impact the rest of the body. 2  2. Notice if you experience fever and/or chills.
The symptoms of cellulitis include: 1  Skin rash that begins suddenly and spreads quickly within 24 hours. 2  Areas of inflamed red skin that grow larger. 3  Tenderness in the affected area. 4  Pain. 5  Skin that appears tight or stretched. 6  Fever.