This preview shows pages 1–2. Sign up to view the full content.
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 xaxis, 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.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview. Sign up
to
access the rest of the document.
 Spring '08
 Weaver
 Math, Statistics, Slope

Click to edit the document details