Jordan's math teacher finds that there's roughly a linear relationship between the amount of time students spend on their homework and their weekly quiz scores. This relationship can be represented by the graph below. What does the y-intercept in the graph represent?1234560687684921001081161241320xy0∙Expected Quiz ScoreTime Spent on Homework per Week (hours)AnswerMultiple Choice AnswersAn expected quiz score of 68 when spending 1 hour on homework.A student's expected quiz score if they spent no time on their homework.The change in expected quiz score for every additional one hour students spend on their homework.A student's expected quiz score if they spent 68 hours on their homework.Submit Answer

A consumer's spending is widely believed to be a function of their income. To estimate this relationship, a university professor randomly selected 19 of his students and collected information on their spending (Y, in dollars) and income (X, in dollars) patterns in week 6 of the semester. Assuming a linear relationship between Y and X, the professor used the least-squares method and found that the Y intercept = 20.90 and the slope = 0.66. Based on this information, the Y intercept should be interpreted as: a. When a student's weekly income equals zero, the mean value of his/her weekly spending is estimated to be $20.90. b. When a student's weekly spending equals zero, the mean value of his/her weekly income is estimated to be $21.56. c. When a student's weekly income equals zero, the mean value of his/her weekly spending is estimated to be $21.56. d. When a student's weekly spending equals zero, the mean value of his/her weekly income is estimated to be $20.90.

orWatch a videoRead the following description of a data set.Mr. Caldwell is offering extra credit on his statistics exam. All students have to do is state how many hours they spent studying for the exam. After he finished grading, Mr. Caldwell looked at how self-reported studying times were related to exam scores.He recorded the number of hours each student had reported studying, x, and his or her exam score (out of 100), y.The least squares regression line of this data set is:y=3.089x+46.103Complete the following sentence:For each additional hour a student had reported studying, the least squares regression line predicts that he or she would score points higher on the exam.Submit

Each year, Mr. Watson's class does a service project. Mr. Watson volunteers 2 hours of time, and he asks each student to volunteer one hour.Let s represent the number of students in Mr. Watson's class one year and h represent the total number of volunteer hours that year.This relationship can also be shown in a table. Complete the equation that represents the relationship between s and h.s h1 32 43 54 6h=

The scatter plot shows the number of hours worked and money spent on entertainment by each of 21 students. Also shown is the line of best fit for the data.Fill in the blanks below.y510152025303540455055606570x2468101214161820220AmountofmoneyspentonentertainmentindollarsNumberofhoursworked(a)For these 21 students, as the number of hours increases, the amount of money spent tends to ▼(Choose one)(b)For these 21 students, there is ▼(Choose one) correlation between the number of hours worked and the amount of money spent.(c)Using the line of best fit, we would predict that a student working 12 hours would spend approximately ▼(Choose one)

An instructor asked her students how much time (to the nearest hour) they spent studying for the midterm. The data are displayed in the following histogram:What do the numbers on the horizontal axis represent?The values of the number of hours studiedThe count of students falling in each of the intervalsWhat do the numbers on the vertical axis represent?The values of the number of hours studiedThe count of students falling in each of the intervalsWhat percentage of students study 6 or more hours for the midterm?24%48%52%72%88%