What would be the appropriate statistical analysis for this situation?

You are interested in conducting a study to compare three different treatments for regulating blood sugar concentrations in patients that suffer from type 2 diabetes. However, you want to control for the effects of body weight, which is an extraneous variable that might have a confounding effect on the results.

What would be the appropriate statistical analysis for this situation?

One-way ANOVA [Chapter 8]

Linear regression [Chapter 10]

Factorial design two-way ANOVA [Chapter 9]

Randomized complete blocking design ANOVA [Chapter 9]