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.
Cellulitis is a skin infection caused by staphylococcus or streptococcus bacteria. It is not contagious. Cellulitis appears as a red, swollen skin rash (usually on the lower legs or arms) that feels tender and hot. It can spread rapidly over the course of 24 hours. In most cases, oral antibiotics effectively treat the infection within 10 to 14 days.