17. 17. Which statement is correct? (Points : 1.5) A) getwd() function can find the linear regression model in R. B) lm() function can find working directory of the R software. C) lm(Incomes~Hours, data=Salary) builds a linear model in which analysts use Hours to predict Incomes. D) In the command lm(Incomes~Hours, data=Salary) , Salary is the dependent variable. Question 18.18. 18. Which statement is valid? (Points : 1.5) A) numberofattacks and numberOfattacks are treated as the same variable name in R. B) numberofattacks = 7 and numberofattacks<-7 can lead to the same outcome in R. C) ggplot() and ggplot2() refer to the same package in R. D) None of above is correct.