To help explain or predict the response variable in every regression study, we use one or more explanatory variables. These variables are also called predictor variables or independent variables.

a. True
b. False

The correct answer is False.

Step-by-step explanation:

To help explain or predict the response variable in every regression study, we use one or more explanatory variables. These variables are also called response variables or dependent variables.

The risk factors and confounders involved are called predictor or independent variables.

These definitions are a part of regression analysis which is a technique to asses the relationship between one or more risk factors and a particular outcome variable.

answer:   (s+1)(s+4)

step-by-step explanation:

factor s2+5s+4

s2+5s+4

=(s+1)(s+4)