Scatterplots Answers

A sociologist recorded the estimated life expectancies of women born in Center City. Use the data from women born in 1970 and 2000 to create a linear model that predicts the life expectancy, in years, (y) of a female born in a given year (x). YearBornLife Expectancy(years)196066.1197067.6198070.1199071.9200074.0201075.9Which equation represents this linear model?

The scatterplot shows the number of athletes on the field hockey and tennis teams at Southern High School during seven different years. Which statement is best supported by the line of best fit?

The scatterplot shows the number of home runs Mario hits during his first four seasons on the company softball team. If his output continues to follow the linear model, approximately how many home runs will Mario hit during his ninth season?

Which phrase best describes the scatterplot below?

The school’s guidance department compares the grade-point averages and standardized state test scores for 10 students in each grade. The table below shows the correlation coefficient for each data set.Grade LevelCorrelation Coefficient9th grade0.310th grade–0.111th grade0.212th grade–0.8For which data set(s) is a linear regression model reasonable?

The line of best fit for the scatterplot below passes through which pair of points?

The graph displays the relationship between the length of time an employee works at a company and the number of the employee’s monthly customers. If the equation for the line of best fit is y = 4.5x + 2, which of the following can be used to interpret the y-intercept in context?

Kyle believes that the equation of the line of best fit for the scatterplot below is . Which statement best summarizes why Kyle is incorrect?