34. Model With Mathematics The tabl the recommended distance of a lig y in feet, from the wall for differer heights x in feet. What is the equa trend line that models the data she table? What does the slope of the represent? 8. 10 11 12 y 20 27 33 40 48
34. Model With Mathematics The tabl the recommended distance of a lig y in feet, from the wall for differer heights x in feet. What is the equa trend line that models the data she table? What does the slope of the represent? 8. 10 11 12 y 20 27 33 40 48
Transcribed Image Text:Quick Review
A paired data set (or a bivariate data set) has
a positive association when y-values tend to
increase as x-values increase and a negative
association when y-values tend to decrease
as x-values increase. When the relationship
between the paired data can be modeled with
a linear function, a line of best fit represents
the relationship. The paired data are positively
correlated if y-values increase as x-values increase
and negatively correlated if y-values decrease as
X-values increase.
Practice & Problem Solving
Describe the type of association each scatter
plot shows.
29.
12
8
4
2.
4
6.
8
30.
ty•
12
Example
Yama takes a course to improve his typing
speed. The scatter plot shows his progress over
six weeks. What is the relationship between the
number of weeks and Yama's typing speed?
8
4
2
6.
8.
ty
31. Reason Where should the line of best fit
be in relationship to the points plotted on a
scatter plot?
40
30
Use Appropriate Tools For each table, make a
scatter plot of the data. If the data suggest a
linear relationship, draw a trend line and write
its equation.
20
10
4
32.
33.
y
y
Week
3
40
As the number of weeks of practice increases,
so does the number of words typed per minute.
The scatter plot shows a positive association that
is approximately linear suggesting a positive
correlation between weeks and words typed per
8.
36
12
31
8
14
12
27
10
18
15
24
minute.
34. Model With Mathematics The table shows
the recommended distance of a light source
y in feet, from the wall for different ceiling
heights x in feet. What is the equation of the
trend line that models the data shown in the
table? What does the slope of the trend line
represent?
8.
9.
10
11
12
y 20 27
33 40 48
Words Typed per Minute
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