i need help with question 3 and 4

4 Subject Hours Studied Mark Mathematics, grade 9 5 70 English, grade 9 3 65 Science, grade 9 4 68 Geography, grade 9 72 French grade 9 2 38 Mathematics, grade 10 7 74 English, grade 10 5 69 Science, grade 10 6 71 History, grade 10 5 75 Mathematics, grade 11 12 76 English, grade 11 9 74 Physics, grade 11 14 78 John has kept track of the hours he spent studying and his marks on examinations .) Create a scatter plot for John's data and classify the lincar correlation b) Perform a regression analysis. Identify the equation of the line of best fit as yl, and record the correlation coefficient c) Identify any outliers d) Repeat part b) with the outlier removed. Identify this line as y2 3. Which of the two linear models found in question 2 gives a more optimistic prediction for John's upcoming biology examination? Explain. 4- a) Identify at least three extraneous variables in John's study b) Suggest some ways that John might improve the validity of his study, Page +