The scores received in four exams in a math class are collected for 50 students. The following Python code is used to fit a simple linear regression model using data from the ExamScores.csv file. Which of the two variables, Exam4 or Exam2, is the response variable? Which is the predictor variable? Select one.

import pandas as pd import statsmodels.formula.api as smf scores = pd.read_csv('http://data-analytics.zybooks.com/ExamScores.csv') model = smf.ols('Exam4 ~ Exam2', scores).fit()

Question options:

	Exam2 and Exam4 are both predictor variables.
	Exam4 is the response variable and Exam2 is the predictor variable.
	Exam2 and Exam4 are both response variables.
	Exam2 is the response variable and Exam4 is the predictor variable.