Math 253 - Chapter 7 Problems-1

# Math 253 - Chapter 7 Problems-1 - Chapter 7 Homework Math...

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Chapter 7 – Homework Math 253 – Spring 2008 – Dr. Weaver 1. a) If the numbers are reported with 3 or 4 digits, then the line would be completely straight, with a positive slope. The value of the slope would depend on the scales used on the two axes. It doesn’t matter which variable is used on the x or y axis because they are the same quantity in different units. (And to pick a nit: you can’t measure weight in grams. The value measured would be mass, not weight.) b) It would be best to use circumference as the x-axis, but it could be done either way. The slope of the line would be positive, but not straight since weight depends on the cube of a linear measurement. To get a straight line, you would have to plot weight against circumference cubed. c) The numerology addicts would probably put shoe size on the x axis. Anyone else would walk away laughing. The results would be random, so the plot would just be a ball of points like figure 7.9 with no tendency in any direction.

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Math 253 - Chapter 7 Problems-1 - Chapter 7 Homework Math...

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