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- 1. Multiple ChoiceWhat is the y-intercept in the following equation: y= -5 - 4x-4-4x5-5
- 2. Multiple ChoiceWhat is the slope in the following equation: y=6 - 2/3x2/36-6-2/3
- 3. Multiple Choice
What does the slope represent in this situation?The sloth runs 1 feet in 3 minutesThe sloth runs 3 feet in 1 minuteThe sloth runs fastThe sloth runs 6 feet in 1 minute - 4. Multiple ChoiceWhat does "b" represent in y=a + bx?y-interceptslopemacaroninothing
- 5. Multiple ChoiceWhen evaluating data on a scatter plot, what can be used to make predictions about the future?interpoationextrapolationcorrelation coefficientcausation
- 6. Multiple ChoiceWhat is the line of best fit? (Ignore the x = 30, y = ? point.)f(x) = 1.82 + 5xcannot be determinedf(x) = 5.02 + 1.82xf(x) = 4.2 + 1.1x
- 7. Multiple ChoiceFind the equation of the line of best fit for the given datay = 4.19 + 163.41xy = 4.19 - 163.41xy =163.41 - 4.19xy = -163.41+ 4.19x
- 8. Multiple ChoiceThe table shown is comparing a person's foot length to their height in cm. Calculate a line of best fit.f(x) = 5.57 + 25.05xf(x) = 25.05 + 5.57xf(x) = 25.05 - 5.57xf(x) = - 25.05 + 5.57x
- 9. Multiple ChoiceWhat is least-squares line used for?To make predictionsTo make the graph look prettyTo connect the pointsTo make it look like you know what you are doing
- 10. Multiple ChoiceThe scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the least-squares line to predict how many chapters would be in a book with 180 pages.12 chapters15 chapters18 chapters21 chapters
- 11. Multiple ChoiceStudents in a group of chess teams submitted data about hours of team practice and the number of matches the team won. The graph shows the results of the data. Based on the linear regression equation y = 3.52 + 3.14x, if a team practices 4.5 hours per week next year, which is the best prediction of the number of chess matches a team could expect to win?about 24about 12about 8about 18
- 12. Multiple ChoiceRich is a member of a gym. He pays a monthly fee plus a per-visit fee. The equation below represents the monthly amount Rich pays for his membership to the gym per month for x visits.
y= 10 + 3x
What does the y-intercept of the graph of this equation represent?The monthly feeHow much Rich pays per visitThe number of times Rich goes to the gymThe total cost at the end of the month - 13. Multiple ChoiceHow much does it cost to have your lawn mowed for 2 hours?$16$17$18$19
- 14. Multiple ChoiceAbout how many male math teachers were there in 2006?15303545
- 15. Multiple ChoiceThe equation of the least-squares line is y= 1 + 1/2x.
How many laps can a bicycle make around the park in 23 minutes?44 laps12 1/2 laps23 laps - 16. Multiple ChoiceBased on the graph, if Joe earned $400, how many hours did he work?25 hours35 hours45 hours15 hours
- 17. Multiple ChoiceThe following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month. Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles?A. 50 minB. 80 minC. 45 minD. 60 min
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