)after the first exam in a large course, the professor surveyed 14 randomly selected students to determine the relation between the amount of time they spent studying for the exam and exam score.  she found that a linear relation exists between the two variables.  the least-squares regression line that describes this relation is  .                  (a)  predict the exam score of a student who studied 2 hours.                  (b)  write an interpretation for the slope. (refer to  lesson 12.2  for this.)                  (c)  write an interpretation for the y-intercept, if appropriate. if not appropriate, explain why not. (again, refer to  lesson 12.2  for this.)  2) in what scenarios would it not make sense to interpret the y-intercept?

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

Part one: measurements 1. measure your own height and arm span (from finger-tip to finger-tip) in inches. you will likely need some from a parent, guardian, or sibling to get accurate measurements. record your measurements on the "data record" document. use the "data record" to you complete part two of this project. name relationship to student x height in inches y arm span in inches archie dad 72 72 ginelle mom 65 66 sarah sister 64 65 meleah sister 66 3/4 67 rachel sister 53 1/2 53 emily auntie 66 1/2 66 hannah myself 66 1/2 69 part two: representation of data with plots 1. using graphing software of your choice, create a scatter plot of your data. predict the line of best fit, and sketch it on your graph. part three: the line of best fit include your scatter plot and the answers to the following questions in your word processing document 1. 1. which variable did you plot on the x-axis, and which variable did you plot on the y-axis? explain why you assigned the variables in that way. 2. write the equation of the line of best fit using the slope-intercept formula $y = mx + b$. show all your work, including the points used to determine the slope and how the equation was determined. 3. what does the slope of the line represent within the context of your graph? what does the y-intercept represent? 5. use the line of best fit to you to describe the data correlation.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes