1. The table below gives the number of hours spent studying for a science exam and the final exam grade.
0
Study hours
Grade
2
77
5
92
1
70
4
90
2
75
3
84
63
a) Using graph paper, draw a scatterplot of the data.
b) What is the equation for the line of best fit? Sketch this on your graph.
Equation
c) Predict the exam grade of a student who studied for 6 hours.
Grade expected
d) Could this line go on forever? Why or why not?

Stu and ambrose are working together on a study of whether diet is related to students' mental health. first, they randomly select 10 students from the student center and 10 students from the office of counseling and psychological services. then, they ask students to rate their diet in terms of healthiness on a scale of 1-100 before completing a 20-item mental health survey. a) name one of the constructs being studied b) how was the construct you named above operationally defined in this experiment? e) was the variable you described above their independent variable, their dependent variable, or a controlled variable? d) what is a confounding variable? what is a potential confound in this study?