A study on driving speed (miles per hour) and fuel efficiency (miles per gallon) for midsize automobiles resulted in the following data. Driving Speed 30 40 60 55 25 30 50 55 25 50 Fuel Efficiency 32 27 21 25 34 30 28 27 37 25 (a) Construct a scatter diagram with driving speed on the horizontal axis and fuel efficiency on the vertical axis. A scatter diagram has 10 points. The horizontal axis is labeled: Driving Speed (MPH), and ranges from 0 to 70. The vertical axis is labeled: Fuel Efficiency (MPG), and ranges from 0 to 40. The graph starts at the points (25, 25) and (25, 26) and moves to the right toward the point (60, 28). The points are all plotted close together and stay between the vertical values of 24 and 29 inclusive. A scatter diagram has 10 points. The horizontal axis is labeled: Driving Speed (MPH), and ranges from 0 to 70. The vertical axis is labeled: Fuel Efficiency (MPG), and ranges from 0 to 40. Most of the points follow a trend that starts at (25, 18) and moves upward towards the point (60, 34). The points are all plotted close together with very little scatter. A scatter diagram has 10 points. The horizontal axis is labeled: Driving Speed (MPH), and ranges from 0 to 70. The vertical axis is labeled: Fuel Efficiency (MPG), and ranges from 0 to 40. Most of the points follow a trend that starts at (25, 37) and moves downward towards the point (60, 21). The points are all plotted close together with very little scatter. A scatter diagram has 10 points. The horizontal axis is labeled: Driving Speed (MPH), and ranges from 0 to 70. The vertical axis is labeled: Fuel Efficiency (MPG), and ranges from 0 to 40. The points plotted from the driving speed values of 25 to 60 are evenly scattered between fuel efficiency values of 23 and 35. (b) Comment on any apparent relationship between these two variables. For midsized cars, all driving speeds seem to yield about the same miles per gallon.For midsized cars, there seems to be no relationship between driving speeds and fuel efficiency.     For midsized cars, lower driving speeds seem to yield higher miles per gallon.For midsized cars, lower driving speeds seem to yield lower miles per gallon.

The amygdala is a brain structure involved in the processing and memory of emotional reactions. In a research project, 10 subjects were shown emotional video clips. They then had their brain scanned with positron emission tomography (PET) and their memory of the clips was assessed quantitatively. Here are the relative amygdala activity and the memory score for each subject: The relationship is (Linear or curved) and ( Moderate, weak, or strong)? The direction of the realtionship is (Negitive or positive)? The amygdala and memory 3/4: The correlation coefficient between relative activity and memory score is: (round your answer to 3 decimal places)

Jim and Larry run a soup stand. The data below represents the sales of soup that they had on 8 randomly selected days, along with the high temperature on that day.   a) Create a scatter diagram for this data set and comment on whether there is a positive or negative relationship between these variables.b) Calculate the correlation coefficient between temperature and sales.c) Does a linear relationship exist between these variables? Explain to me why or why not this is the case.d) Using excel, calculate the least squares regression equation for this data set. e) Using your equation, predict the soup sales on a day where the temperature is 29 degrees.f) Interpret the slope of this equation.g) Can we use this data set and regression equation to predict the sales on a day when the average temperature is 102 degrees? Why or why not?h) What is the R-squared for this equation? How do you interpret that R-squared?

With this chart, what would be the most appropriate scatter plot from these choices?